drivers/platform/x86/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define TPACPI_VERSION "0.23"
  25 #define TPACPI_SYSFS_VERSION 0x020400
  26
  27 /*
  28  *  Changelog:
  29  *  2007-10-20          changelog trimmed down
  30  *
  31  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  32  *                      drivers/misc.
  33  *
  34  *  2006-11-22  0.13    new maintainer
  35  *                      changelog now lives in git commit history, and will
  36  *                      not be updated further in-file.
  37  *
  38  *  2005-03-17  0.11    support for 600e, 770x
  39  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  40  *
  41  *  2005-01-16  0.9     use MODULE_VERSION
  42  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  43  *                      fix parameter passing on module loading
  44  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  45  *                          thanks to Jim Radford <radford@blackbean.org>
  46  *  2004-11-08  0.8     fix init error case, don't return from a macro
  47  *                          thanks to Chris Wright <chrisw@osdl.org>
  48  */
  49
  50 #include <linux/kernel.h>
  51 #include <linux/module.h>
  52 #include <linux/init.h>
  53 #include <linux/types.h>
  54 #include <linux/string.h>
  55 #include <linux/list.h>
  56 #include <linux/mutex.h>
  57 #include <linux/sched.h>
  58 #include <linux/kthread.h>
  59 #include <linux/freezer.h>
  60 #include <linux/delay.h>
  61
  62 #include <linux/nvram.h>
  63 #include <linux/proc_fs.h>
  64 #include <linux/sysfs.h>
  65 #include <linux/backlight.h>
  66 #include <linux/fb.h>
  67 #include <linux/platform_device.h>
  68 #include <linux/hwmon.h>
  69 #include <linux/hwmon-sysfs.h>
  70 #include <linux/input.h>
  71 #include <linux/leds.h>
  72 #include <linux/rfkill.h>
  73 #include <asm/uaccess.h>
  74
  75 #include <linux/dmi.h>
  76 #include <linux/jiffies.h>
  77 #include <linux/workqueue.h>
  78
  79 #include <acpi/acpi_drivers.h>
  80
  81 #include <linux/pci_ids.h>
  82
  83
  84 /* ThinkPad CMOS commands */
  85 #define TP_CMOS_VOLUME_DOWN     0
  86 #define TP_CMOS_VOLUME_UP       1
  87 #define TP_CMOS_VOLUME_MUTE     2
  88 #define TP_CMOS_BRIGHTNESS_UP   4
  89 #define TP_CMOS_BRIGHTNESS_DOWN 5
  90 #define TP_CMOS_THINKLIGHT_ON   12
  91 #define TP_CMOS_THINKLIGHT_OFF  13
  92
  93 /* NVRAM Addresses */
  94 enum tp_nvram_addr {
  95         TP_NVRAM_ADDR_HK2               = 0x57,
  96         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  97         TP_NVRAM_ADDR_VIDEO             = 0x59,
  98         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  99         TP_NVRAM_ADDR_MIXER             = 0x60,
 100 };
 101
 102 /* NVRAM bit masks */
 103 enum {
 104         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 105         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 106         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 107         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 108         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 109         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 110         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 111         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 112         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 113         TP_NVRAM_MASK_MUTE              = 0x40,
 114         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 115         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 116         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 117 };
 118
 119 /* ACPI HIDs */
 120 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 121
 122 /* Input IDs */
 123 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 124 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 125
 126 /* ACPI \WGSV commands */
 127 enum {
 128         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
 129         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
 130         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
 131         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
 132 };
 133
 134 /* TP_ACPI_WGSV_GET_STATE bits */
 135 enum {
 136         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
 137         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
 138         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
 139         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
 140         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
 141         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
 142         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
 143         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
 144         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
 145         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
 146 };
 147
 148 /****************************************************************************
 149  * Main driver
 150  */
 151
 152 #define TPACPI_NAME "thinkpad"
 153 #define TPACPI_DESC "ThinkPad ACPI Extras"
 154 #define TPACPI_FILE TPACPI_NAME "_acpi"
 155 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 156 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 157
 158 #define TPACPI_PROC_DIR "ibm"
 159 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 160 #define TPACPI_DRVR_NAME TPACPI_FILE
 161 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 162 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 163
 164 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 165 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 166
 167 #define TPACPI_MAX_ACPI_ARGS 3
 168
 169 /* printk headers */
 170 #define TPACPI_LOG TPACPI_FILE ": "
 171 #define TPACPI_EMERG    KERN_EMERG      TPACPI_LOG
 172 #define TPACPI_ALERT    KERN_ALERT      TPACPI_LOG
 173 #define TPACPI_CRIT     KERN_CRIT       TPACPI_LOG
 174 #define TPACPI_ERR      KERN_ERR        TPACPI_LOG
 175 #define TPACPI_WARN     KERN_WARNING    TPACPI_LOG
 176 #define TPACPI_NOTICE   KERN_NOTICE     TPACPI_LOG
 177 #define TPACPI_INFO     KERN_INFO       TPACPI_LOG
 178 #define TPACPI_DEBUG    KERN_DEBUG      TPACPI_LOG
 179
 180 /* Debugging printk groups */
 181 #define TPACPI_DBG_ALL          0xffff
 182 #define TPACPI_DBG_DISCLOSETASK 0x8000
 183 #define TPACPI_DBG_INIT         0x0001
 184 #define TPACPI_DBG_EXIT         0x0002
 185 #define TPACPI_DBG_RFKILL       0x0004
 186 #define TPACPI_DBG_HKEY         0x0008
 187 #define TPACPI_DBG_FAN          0x0010
 188 #define TPACPI_DBG_BRGHT        0x0020
 189
 190 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 191 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 192 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 193
 194
 195 /****************************************************************************
 196  * Driver-wide structs and misc. variables
 197  */
 198
 199 struct ibm_struct;
 200
 201 struct tp_acpi_drv_struct {
 202         const struct acpi_device_id *hid;
 203         struct acpi_driver *driver;
 204
 205         void (*notify) (struct ibm_struct *, u32);
 206         acpi_handle *handle;
 207         u32 type;
 208         struct acpi_device *device;
 209 };
 210
 211 struct ibm_struct {
 212         char *name;
 213
 214         int (*read) (char *);
 215         int (*write) (char *);
 216         void (*exit) (void);
 217         void (*resume) (void);
 218         void (*suspend) (pm_message_t state);
 219         void (*shutdown) (void);
 220
 221         struct list_head all_drivers;
 222
 223         struct tp_acpi_drv_struct *acpi;
 224
 225         struct {
 226                 u8 acpi_driver_registered:1;
 227                 u8 acpi_notify_installed:1;
 228                 u8 proc_created:1;
 229                 u8 init_called:1;
 230                 u8 experimental:1;
 231         } flags;
 232 };
 233
 234 struct ibm_init_struct {
 235         char param[32];
 236
 237         int (*init) (struct ibm_init_struct *);
 238         struct ibm_struct *data;
 239 };
 240
 241 static struct {
 242         u32 bluetooth:1;
 243         u32 hotkey:1;
 244         u32 hotkey_mask:1;
 245         u32 hotkey_wlsw:1;
 246         u32 hotkey_tablet:1;
 247         u32 light:1;
 248         u32 light_status:1;
 249         u32 bright_16levels:1;
 250         u32 bright_acpimode:1;
 251         u32 wan:1;
 252         u32 uwb:1;
 253         u32 fan_ctrl_status_undef:1;
 254         u32 second_fan:1;
 255         u32 beep_needs_two_args:1;
 256         u32 input_device_registered:1;
 257         u32 platform_drv_registered:1;
 258         u32 platform_drv_attrs_registered:1;
 259         u32 sensors_pdrv_registered:1;
 260         u32 sensors_pdrv_attrs_registered:1;
 261         u32 sensors_pdev_attrs_registered:1;
 262         u32 hotkey_poll_active:1;
 263 } tp_features;
 264
 265 static struct {
 266         u16 hotkey_mask_ff:1;
 267 } tp_warned;
 268
 269 struct thinkpad_id_data {
 270         unsigned int vendor;    /* ThinkPad vendor:
 271                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 272
 273         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 274         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 275
 276         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
 277         u16 ec_model;
 278         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
 279         u16 ec_release;
 280
 281         char *model_str;        /* ThinkPad T43 */
 282         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 283 };
 284 static struct thinkpad_id_data thinkpad_id;
 285
 286 static enum {
 287         TPACPI_LIFE_INIT = 0,
 288         TPACPI_LIFE_RUNNING,
 289         TPACPI_LIFE_EXITING,
 290 } tpacpi_lifecycle;
 291
 292 static int experimental;
 293 static u32 dbg_level;
 294
 295 static struct workqueue_struct *tpacpi_wq;
 296
 297 enum led_status_t {
 298         TPACPI_LED_OFF = 0,
 299         TPACPI_LED_ON,
 300         TPACPI_LED_BLINK,
 301 };
 302
 303 /* Special LED class that can defer work */
 304 struct tpacpi_led_classdev {
 305         struct led_classdev led_classdev;
 306         struct work_struct work;
 307         enum led_status_t new_state;
 308         unsigned int led;
 309 };
 310
 311 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 312 static int dbg_wlswemul;
 313 static int tpacpi_wlsw_emulstate;
 314 static int dbg_bluetoothemul;
 315 static int tpacpi_bluetooth_emulstate;
 316 static int dbg_wwanemul;
 317 static int tpacpi_wwan_emulstate;
 318 static int dbg_uwbemul;
 319 static int tpacpi_uwb_emulstate;
 320 #endif
 321
 322
 323 /*************************************************************************
 324  *  Debugging helpers
 325  */
 326
 327 #define dbg_printk(a_dbg_level, format, arg...) \
 328         do { if (dbg_level & (a_dbg_level)) \
 329                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 330         } while (0)
 331
 332 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 333 #define vdbg_printk dbg_printk
 334 static const char *str_supported(int is_supported);
 335 #else
 336 #define vdbg_printk(a_dbg_level, format, arg...) \
 337         do { } while (0)
 338 #endif
 339
 340 static void tpacpi_log_usertask(const char * const what)
 341 {
 342         printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
 343                 what, task_tgid_vnr(current));
 344 }
 345
 346 #define tpacpi_disclose_usertask(what, format, arg...) \
 347         do { \
 348                 if (unlikely( \
 349                     (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
 350                     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
 351                         printk(TPACPI_DEBUG "%s: PID %d: " format, \
 352                                 what, task_tgid_vnr(current), ## arg); \
 353                 } \
 354         } while (0)
 355
 356 /*
 357  * Quirk handling helpers
 358  *
 359  * ThinkPad IDs and versions seen in the field so far
 360  * are two-characters from the set [0-9A-Z], i.e. base 36.
 361  *
 362  * We use values well outside that range as specials.
 363  */
 364
 365 #define TPACPI_MATCH_ANY                0xffffU
 366 #define TPACPI_MATCH_UNKNOWN            0U
 367
 368 /* TPID('1', 'Y') == 0x5931 */
 369 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
 370
 371 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
 372         { .vendor = PCI_VENDOR_ID_IBM,          \
 373           .bios = TPID(__id1, __id2),           \
 374           .ec = TPACPI_MATCH_ANY,               \
 375           .quirks = (__quirk) }
 376
 377 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
 378         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 379           .bios = TPID(__id1, __id2),           \
 380           .ec = TPACPI_MATCH_ANY,               \
 381           .quirks = (__quirk) }
 382
 383 struct tpacpi_quirk {
 384         unsigned int vendor;
 385         u16 bios;
 386         u16 ec;
 387         unsigned long quirks;
 388 };
 389
 390 /**
 391  * tpacpi_check_quirks() - search BIOS/EC version on a list
 392  * @qlist:              array of &struct tpacpi_quirk
 393  * @qlist_size:         number of elements in @qlist
 394  *
 395  * Iterates over a quirks list until one is found that matches the
 396  * ThinkPad's vendor, BIOS and EC model.
 397  *
 398  * Returns 0 if nothing matches, otherwise returns the quirks field of
 399  * the matching &struct tpacpi_quirk entry.
 400  *
 401  * The match criteria is: vendor, ec and bios much match.
 402  */
 403 static unsigned long __init tpacpi_check_quirks(
 404                         const struct tpacpi_quirk *qlist,
 405                         unsigned int qlist_size)
 406 {
 407         while (qlist_size) {
 408                 if ((qlist->vendor == thinkpad_id.vendor ||
 409                                 qlist->vendor == TPACPI_MATCH_ANY) &&
 410                     (qlist->bios == thinkpad_id.bios_model ||
 411                                 qlist->bios == TPACPI_MATCH_ANY) &&
 412                     (qlist->ec == thinkpad_id.ec_model ||
 413                                 qlist->ec == TPACPI_MATCH_ANY))
 414                         return qlist->quirks;
 415
 416                 qlist_size--;
 417                 qlist++;
 418         }
 419         return 0;
 420 }
 421
 422
 423 /****************************************************************************
 424  ****************************************************************************
 425  *
 426  * ACPI Helpers and device model
 427  *
 428  ****************************************************************************
 429  ****************************************************************************/
 430
 431 /*************************************************************************
 432  * ACPI basic handles
 433  */
 434
 435 static acpi_handle root_handle;
 436
 437 #define TPACPI_HANDLE(object, parent, paths...)                 \
 438         static acpi_handle  object##_handle;                    \
 439         static acpi_handle *object##_parent = &parent##_handle; \
 440         static char        *object##_path;                      \
 441         static char        *object##_paths[] = { paths }
 442
 443 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 444            "\\_SB.PCI.ISA.EC",  /* 570 */
 445            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 446            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 447            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 448            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 449            "\\_SB.PCI0.LPC.EC", /* all others */
 450            );
 451
 452 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 453 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 454
 455 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 456                                         /* T4x, X31, X40 */
 457            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 458            "\\CMS",             /* R40, R40e */
 459            );                   /* all others */
 460
 461 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 462            "^HKEY",             /* R30, R31 */
 463            "HKEY",              /* all others */
 464            );                   /* 570 */
 465
 466 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 467            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 468            "\\_SB.PCI0.VID0",   /* 770e */
 469            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 470            "\\_SB.PCI0.AGP.VID",        /* all others */
 471            );                           /* R30, R31 */
 472
 473
 474 /*************************************************************************
 475  * ACPI helpers
 476  */
 477
 478 static int acpi_evalf(acpi_handle handle,
 479                       void *res, char *method, char *fmt, ...)
 480 {
 481         char *fmt0 = fmt;
 482         struct acpi_object_list params;
 483         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 484         struct acpi_buffer result, *resultp;
 485         union acpi_object out_obj;
 486         acpi_status status;
 487         va_list ap;
 488         char res_type;
 489         int success;
 490         int quiet;
 491
 492         if (!*fmt) {
 493                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 494                 return 0;
 495         }
 496
 497         if (*fmt == 'q') {
 498                 quiet = 1;
 499                 fmt++;
 500         } else
 501                 quiet = 0;
 502
 503         res_type = *(fmt++);
 504
 505         params.count = 0;
 506         params.pointer = &in_objs[0];
 507
 508         va_start(ap, fmt);
 509         while (*fmt) {
 510                 char c = *(fmt++);
 511                 switch (c) {
 512                 case 'd':       /* int */
 513                         in_objs[params.count].integer.value = va_arg(ap, int);
 514                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 515                         break;
 516                         /* add more types as needed */
 517                 default:
 518                         printk(TPACPI_ERR "acpi_evalf() called "
 519                                "with invalid format character '%c'\n", c);
 520                         return 0;
 521                 }
 522         }
 523         va_end(ap);
 524
 525         if (res_type != 'v') {
 526                 result.length = sizeof(out_obj);
 527                 result.pointer = &out_obj;
 528                 resultp = &result;
 529         } else
 530                 resultp = NULL;
 531
 532         status = acpi_evaluate_object(handle, method, &params, resultp);
 533
 534         switch (res_type) {
 535         case 'd':               /* int */
 536                 if (res)
 537                         *(int *)res = out_obj.integer.value;
 538                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 539                 break;
 540         case 'v':               /* void */
 541                 success = status == AE_OK;
 542                 break;
 543                 /* add more types as needed */
 544         default:
 545                 printk(TPACPI_ERR "acpi_evalf() called "
 546                        "with invalid format character '%c'\n", res_type);
 547                 return 0;
 548         }
 549
 550         if (!success && !quiet)
 551                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 552                        method, fmt0, status);
 553
 554         return success;
 555 }
 556
 557 static int acpi_ec_read(int i, u8 *p)
 558 {
 559         int v;
 560
 561         if (ecrd_handle) {
 562                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 563                         return 0;
 564                 *p = v;
 565         } else {
 566                 if (ec_read(i, p) < 0)
 567                         return 0;
 568         }
 569
 570         return 1;
 571 }
 572
 573 static int acpi_ec_write(int i, u8 v)
 574 {
 575         if (ecwr_handle) {
 576                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 577                         return 0;
 578         } else {
 579                 if (ec_write(i, v) < 0)
 580                         return 0;
 581         }
 582
 583         return 1;
 584 }
 585
 586 static int issue_thinkpad_cmos_command(int cmos_cmd)
 587 {
 588         if (!cmos_handle)
 589                 return -ENXIO;
 590
 591         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 592                 return -EIO;
 593
 594         return 0;
 595 }
 596
 597 /*************************************************************************
 598  * ACPI device model
 599  */
 600
 601 #define TPACPI_ACPIHANDLE_INIT(object) \
 602         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 603                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 604
 605 static void drv_acpi_handle_init(char *name,
 606                            acpi_handle *handle, acpi_handle parent,
 607                            char **paths, int num_paths, char **path)
 608 {
 609         int i;
 610         acpi_status status;
 611
 612         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 613                 name);
 614
 615         for (i = 0; i < num_paths; i++) {
 616                 status = acpi_get_handle(parent, paths[i], handle);
 617                 if (ACPI_SUCCESS(status)) {
 618                         *path = paths[i];
 619                         dbg_printk(TPACPI_DBG_INIT,
 620                                    "Found ACPI handle %s for %s\n",
 621                                    *path, name);
 622                         return;
 623                 }
 624         }
 625
 626         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 627                     name);
 628         *handle = NULL;
 629 }
 630
 631 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 632 {
 633         struct ibm_struct *ibm = data;
 634
 635         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 636                 return;
 637
 638         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 639                 return;
 640
 641         ibm->acpi->notify(ibm, event);
 642 }
 643
 644 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 645 {
 646         acpi_status status;
 647         int rc;
 648
 649         BUG_ON(!ibm->acpi);
 650
 651         if (!*ibm->acpi->handle)
 652                 return 0;
 653
 654         vdbg_printk(TPACPI_DBG_INIT,
 655                 "setting up ACPI notify for %s\n", ibm->name);
 656
 657         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 658         if (rc < 0) {
 659                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 660                         ibm->name, rc);
 661                 return -ENODEV;
 662         }
 663
 664         ibm->acpi->device->driver_data = ibm;
 665         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 666                 TPACPI_ACPI_EVENT_PREFIX,
 667                 ibm->name);
 668
 669         status = acpi_install_notify_handler(*ibm->acpi->handle,
 670                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 671         if (ACPI_FAILURE(status)) {
 672                 if (status == AE_ALREADY_EXISTS) {
 673                         printk(TPACPI_NOTICE
 674                                "another device driver is already "
 675                                "handling %s events\n", ibm->name);
 676                 } else {
 677                         printk(TPACPI_ERR
 678                                "acpi_install_notify_handler(%s) failed: %d\n",
 679                                ibm->name, status);
 680                 }
 681                 return -ENODEV;
 682         }
 683         ibm->flags.acpi_notify_installed = 1;
 684         return 0;
 685 }
 686
 687 static int __init tpacpi_device_add(struct acpi_device *device)
 688 {
 689         return 0;
 690 }
 691
 692 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 693 {
 694         int rc;
 695
 696         dbg_printk(TPACPI_DBG_INIT,
 697                 "registering %s as an ACPI driver\n", ibm->name);
 698
 699         BUG_ON(!ibm->acpi);
 700
 701         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 702         if (!ibm->acpi->driver) {
 703                 printk(TPACPI_ERR
 704                        "failed to allocate memory for ibm->acpi->driver\n");
 705                 return -ENOMEM;
 706         }
 707
 708         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 709         ibm->acpi->driver->ids = ibm->acpi->hid;
 710
 711         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 712
 713         rc = acpi_bus_register_driver(ibm->acpi->driver);
 714         if (rc < 0) {
 715                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 716                        ibm->name, rc);
 717                 kfree(ibm->acpi->driver);
 718                 ibm->acpi->driver = NULL;
 719         } else if (!rc)
 720                 ibm->flags.acpi_driver_registered = 1;
 721
 722         return rc;
 723 }
 724
 725
 726 /****************************************************************************
 727  ****************************************************************************
 728  *
 729  * Procfs Helpers
 730  *
 731  ****************************************************************************
 732  ****************************************************************************/
 733
 734 static int dispatch_procfs_read(char *page, char **start, off_t off,
 735                         int count, int *eof, void *data)
 736 {
 737         struct ibm_struct *ibm = data;
 738         int len;
 739
 740         if (!ibm || !ibm->read)
 741                 return -EINVAL;
 742
 743         len = ibm->read(page);
 744         if (len < 0)
 745                 return len;
 746
 747         if (len <= off + count)
 748                 *eof = 1;
 749         *start = page + off;
 750         len -= off;
 751         if (len > count)
 752                 len = count;
 753         if (len < 0)
 754                 len = 0;
 755
 756         return len;
 757 }
 758
 759 static int dispatch_procfs_write(struct file *file,
 760                         const char __user *userbuf,
 761                         unsigned long count, void *data)
 762 {
 763         struct ibm_struct *ibm = data;
 764         char *kernbuf;
 765         int ret;
 766
 767         if (!ibm || !ibm->write)
 768                 return -EINVAL;
 769         if (count > PAGE_SIZE - 2)
 770                 return -EINVAL;
 771
 772         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 773         if (!kernbuf)
 774                 return -ENOMEM;
 775
 776         if (copy_from_user(kernbuf, userbuf, count)) {
 777                 kfree(kernbuf);
 778                 return -EFAULT;
 779         }
 780
 781         kernbuf[count] = 0;
 782         strcat(kernbuf, ",");
 783         ret = ibm->write(kernbuf);
 784         if (ret == 0)
 785                 ret = count;
 786
 787         kfree(kernbuf);
 788
 789         return ret;
 790 }
 791
 792 static char *next_cmd(char **cmds)
 793 {
 794         char *start = *cmds;
 795         char *end;
 796
 797         while ((end = strchr(start, ',')) && end == start)
 798                 start = end + 1;
 799
 800         if (!end)
 801                 return NULL;
 802
 803         *end = 0;
 804         *cmds = end + 1;
 805         return start;
 806 }
 807
 808
 809 /****************************************************************************
 810  ****************************************************************************
 811  *
 812  * Device model: input, hwmon and platform
 813  *
 814  ****************************************************************************
 815  ****************************************************************************/
 816
 817 static struct platform_device *tpacpi_pdev;
 818 static struct platform_device *tpacpi_sensors_pdev;
 819 static struct device *tpacpi_hwmon;
 820 static struct input_dev *tpacpi_inputdev;
 821 static struct mutex tpacpi_inputdev_send_mutex;
 822 static LIST_HEAD(tpacpi_all_drivers);
 823
 824 static int tpacpi_suspend_handler(struct platform_device *pdev,
 825                                   pm_message_t state)
 826 {
 827         struct ibm_struct *ibm, *itmp;
 828
 829         list_for_each_entry_safe(ibm, itmp,
 830                                  &tpacpi_all_drivers,
 831                                  all_drivers) {
 832                 if (ibm->suspend)
 833                         (ibm->suspend)(state);
 834         }
 835
 836         return 0;
 837 }
 838
 839 static int tpacpi_resume_handler(struct platform_device *pdev)
 840 {
 841         struct ibm_struct *ibm, *itmp;
 842
 843         list_for_each_entry_safe(ibm, itmp,
 844                                  &tpacpi_all_drivers,
 845                                  all_drivers) {
 846                 if (ibm->resume)
 847                         (ibm->resume)();
 848         }
 849
 850         return 0;
 851 }
 852
 853 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 854 {
 855         struct ibm_struct *ibm, *itmp;
 856
 857         list_for_each_entry_safe(ibm, itmp,
 858                                  &tpacpi_all_drivers,
 859                                  all_drivers) {
 860                 if (ibm->shutdown)
 861                         (ibm->shutdown)();
 862         }
 863 }
 864
 865 static struct platform_driver tpacpi_pdriver = {
 866         .driver = {
 867                 .name = TPACPI_DRVR_NAME,
 868                 .owner = THIS_MODULE,
 869         },
 870         .suspend = tpacpi_suspend_handler,
 871         .resume = tpacpi_resume_handler,
 872         .shutdown = tpacpi_shutdown_handler,
 873 };
 874
 875 static struct platform_driver tpacpi_hwmon_pdriver = {
 876         .driver = {
 877                 .name = TPACPI_HWMON_DRVR_NAME,
 878                 .owner = THIS_MODULE,
 879         },
 880 };
 881
 882 /*************************************************************************
 883  * sysfs support helpers
 884  */
 885
 886 struct attribute_set {
 887         unsigned int members, max_members;
 888         struct attribute_group group;
 889 };
 890
 891 struct attribute_set_obj {
 892         struct attribute_set s;
 893         struct attribute *a;
 894 } __attribute__((packed));
 895
 896 static struct attribute_set *create_attr_set(unsigned int max_members,
 897                                                 const char *name)
 898 {
 899         struct attribute_set_obj *sobj;
 900
 901         if (max_members == 0)
 902                 return NULL;
 903
 904         /* Allocates space for implicit NULL at the end too */
 905         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 906                     max_members * sizeof(struct attribute *),
 907                     GFP_KERNEL);
 908         if (!sobj)
 909                 return NULL;
 910         sobj->s.max_members = max_members;
 911         sobj->s.group.attrs = &sobj->a;
 912         sobj->s.group.name = name;
 913
 914         return &sobj->s;
 915 }
 916
 917 #define destroy_attr_set(_set) \
 918         kfree(_set);
 919
 920 /* not multi-threaded safe, use it in a single thread per set */
 921 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 922 {
 923         if (!s || !attr)
 924                 return -EINVAL;
 925
 926         if (s->members >= s->max_members)
 927                 return -ENOMEM;
 928
 929         s->group.attrs[s->members] = attr;
 930         s->members++;
 931
 932         return 0;
 933 }
 934
 935 static int add_many_to_attr_set(struct attribute_set *s,
 936                         struct attribute **attr,
 937                         unsigned int count)
 938 {
 939         int i, res;
 940
 941         for (i = 0; i < count; i++) {
 942                 res = add_to_attr_set(s, attr[i]);
 943                 if (res)
 944                         return res;
 945         }
 946
 947         return 0;
 948 }
 949
 950 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 951 {
 952         sysfs_remove_group(kobj, &s->group);
 953         destroy_attr_set(s);
 954 }
 955
 956 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 957         sysfs_create_group(_kobj, &_attr_set->group)
 958
 959 static int parse_strtoul(const char *buf,
 960                 unsigned long max, unsigned long *value)
 961 {
 962         char *endp;
 963
 964         while (*buf && isspace(*buf))
 965                 buf++;
 966         *value = simple_strtoul(buf, &endp, 0);
 967         while (*endp && isspace(*endp))
 968                 endp++;
 969         if (*endp || *value > max)
 970                 return -EINVAL;
 971
 972         return 0;
 973 }
 974
 975 static void tpacpi_disable_brightness_delay(void)
 976 {
 977         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
 978                 printk(TPACPI_NOTICE
 979                         "ACPI backlight control delay disabled\n");
 980 }
 981
 982 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
 983 {
 984         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 985         union acpi_object *obj;
 986         int rc;
 987
 988         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
 989                 obj = (union acpi_object *)buffer.pointer;
 990                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 991                         printk(TPACPI_ERR "Unknown _BCL data, "
 992                                "please report this to %s\n", TPACPI_MAIL);
 993                         rc = 0;
 994                 } else {
 995                         rc = obj->package.count;
 996                 }
 997         } else {
 998                 return 0;
 999         }
1000
1001         kfree(buffer.pointer);
1002         return rc;
1003 }
1004
1005 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1006                                         u32 lvl, void *context, void **rv)
1007 {
1008         char name[ACPI_PATH_SEGMENT_LENGTH];
1009         struct acpi_buffer buffer = { sizeof(name), &name };
1010
1011         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1012             !strncmp("_BCL", name, sizeof(name) - 1)) {
1013                 BUG_ON(!rv || !*rv);
1014                 **(int **)rv = tpacpi_query_bcl_levels(handle);
1015                 return AE_CTRL_TERMINATE;
1016         } else {
1017                 return AE_OK;
1018         }
1019 }
1020
1021 /*
1022  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1023  */
1024 static int __init tpacpi_check_std_acpi_brightness_support(void)
1025 {
1026         int status;
1027         int bcl_levels = 0;
1028         void *bcl_ptr = &bcl_levels;
1029
1030         if (!vid_handle) {
1031                 TPACPI_ACPIHANDLE_INIT(vid);
1032         }
1033         if (!vid_handle)
1034                 return 0;
1035
1036         /*
1037          * Search for a _BCL method, and execute it.  This is safe on all
1038          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1039          * BIOS in ACPI backlight control mode.  We do NOT have to care
1040          * about calling the _BCL method in an enabled video device, any
1041          * will do for our purposes.
1042          */
1043
1044         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1045                                      tpacpi_acpi_walk_find_bcl, NULL,
1046                                      &bcl_ptr);
1047
1048         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1049                 tp_features.bright_acpimode = 1;
1050                 return (bcl_levels - 2);
1051         }
1052
1053         return 0;
1054 }
1055
1056 static void printk_deprecated_attribute(const char * const what,
1057                                         const char * const details)
1058 {
1059         tpacpi_log_usertask("deprecated sysfs attribute");
1060         printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1061                 "will be removed. %s\n",
1062                 what, details);
1063 }
1064
1065 /*************************************************************************
1066  * rfkill and radio control support helpers
1067  */
1068
1069 /*
1070  * ThinkPad-ACPI firmware handling model:
1071  *
1072  * WLSW (master wireless switch) is event-driven, and is common to all
1073  * firmware-controlled radios.  It cannot be controlled, just monitored,
1074  * as expected.  It overrides all radio state in firmware
1075  *
1076  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1077  * (TODO: verify how WLSW interacts with the returned radio state).
1078  *
1079  * The only time there are shadow radio state changes, is when
1080  * masked-off hotkeys are used.
1081  */
1082
1083 /*
1084  * Internal driver API for radio state:
1085  *
1086  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1087  * bool: true means radio blocked (off)
1088  */
1089 enum tpacpi_rfkill_state {
1090         TPACPI_RFK_RADIO_OFF = 0,
1091         TPACPI_RFK_RADIO_ON
1092 };
1093
1094 /* rfkill switches */
1095 enum tpacpi_rfk_id {
1096         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1097         TPACPI_RFK_WWAN_SW_ID,
1098         TPACPI_RFK_UWB_SW_ID,
1099         TPACPI_RFK_SW_MAX
1100 };
1101
1102 static const char *tpacpi_rfkill_names[] = {
1103         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1104         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1105         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1106         [TPACPI_RFK_SW_MAX] = NULL
1107 };
1108
1109 /* ThinkPad-ACPI rfkill subdriver */
1110 struct tpacpi_rfk {
1111         struct rfkill *rfkill;
1112         enum tpacpi_rfk_id id;
1113         const struct tpacpi_rfk_ops *ops;
1114 };
1115
1116 struct tpacpi_rfk_ops {
1117         /* firmware interface */
1118         int (*get_status)(void);
1119         int (*set_status)(const enum tpacpi_rfkill_state);
1120 };
1121
1122 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1123
1124 /* Query FW and update rfkill sw state for a given rfkill switch */
1125 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1126 {
1127         int status;
1128
1129         if (!tp_rfk)
1130                 return -ENODEV;
1131
1132         status = (tp_rfk->ops->get_status)();
1133         if (status < 0)
1134                 return status;
1135
1136         rfkill_set_sw_state(tp_rfk->rfkill,
1137                             (status == TPACPI_RFK_RADIO_OFF));
1138
1139         return status;
1140 }
1141
1142 /* Query FW and update rfkill sw state for all rfkill switches */
1143 static void tpacpi_rfk_update_swstate_all(void)
1144 {
1145         unsigned int i;
1146
1147         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1148                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1149 }
1150
1151 /*
1152  * Sync the HW-blocking state of all rfkill switches,
1153  * do notice it causes the rfkill core to schedule uevents
1154  */
1155 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1156 {
1157         unsigned int i;
1158         struct tpacpi_rfk *tp_rfk;
1159
1160         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1161                 tp_rfk = tpacpi_rfkill_switches[i];
1162                 if (tp_rfk) {
1163                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1164                                                 blocked)) {
1165                                 /* ignore -- we track sw block */
1166                         }
1167                 }
1168         }
1169 }
1170
1171 /* Call to get the WLSW state from the firmware */
1172 static int hotkey_get_wlsw(void);
1173
1174 /* Call to query WLSW state and update all rfkill switches */
1175 static bool tpacpi_rfk_check_hwblock_state(void)
1176 {
1177         int res = hotkey_get_wlsw();
1178         int hw_blocked;
1179
1180         /* When unknown or unsupported, we have to assume it is unblocked */
1181         if (res < 0)
1182                 return false;
1183
1184         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1185         tpacpi_rfk_update_hwblock_state(hw_blocked);
1186
1187         return hw_blocked;
1188 }
1189
1190 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1191 {
1192         struct tpacpi_rfk *tp_rfk = data;
1193         int res;
1194
1195         dbg_printk(TPACPI_DBG_RFKILL,
1196                    "request to change radio state to %s\n",
1197                    blocked ? "blocked" : "unblocked");
1198
1199         /* try to set radio state */
1200         res = (tp_rfk->ops->set_status)(blocked ?
1201                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1202
1203         /* and update the rfkill core with whatever the FW really did */
1204         tpacpi_rfk_update_swstate(tp_rfk);
1205
1206         return (res < 0) ? res : 0;
1207 }
1208
1209 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1210         .set_block = tpacpi_rfk_hook_set_block,
1211 };
1212
1213 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1214                         const struct tpacpi_rfk_ops *tp_rfkops,
1215                         const enum rfkill_type rfktype,
1216                         const char *name,
1217                         const bool set_default)
1218 {
1219         struct tpacpi_rfk *atp_rfk;
1220         int res;
1221         bool sw_state = false;
1222         int sw_status;
1223
1224         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1225
1226         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1227         if (atp_rfk)
1228                 atp_rfk->rfkill = rfkill_alloc(name,
1229                                                 &tpacpi_pdev->dev,
1230                                                 rfktype,
1231                                                 &tpacpi_rfk_rfkill_ops,
1232                                                 atp_rfk);
1233         if (!atp_rfk || !atp_rfk->rfkill) {
1234                 printk(TPACPI_ERR
1235                         "failed to allocate memory for rfkill class\n");
1236                 kfree(atp_rfk);
1237                 return -ENOMEM;
1238         }
1239
1240         atp_rfk->id = id;
1241         atp_rfk->ops = tp_rfkops;
1242
1243         sw_status = (tp_rfkops->get_status)();
1244         if (sw_status < 0) {
1245                 printk(TPACPI_ERR
1246                         "failed to read initial state for %s, error %d\n",
1247                         name, sw_status);
1248         } else {
1249                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1250                 if (set_default) {
1251                         /* try to keep the initial state, since we ask the
1252                          * firmware to preserve it across S5 in NVRAM */
1253                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1254                 }
1255         }
1256         rfkill_set_hw_state(atp_rfk->rfkill, tpacpi_rfk_check_hwblock_state());
1257
1258         res = rfkill_register(atp_rfk->rfkill);
1259         if (res < 0) {
1260                 printk(TPACPI_ERR
1261                         "failed to register %s rfkill switch: %d\n",
1262                         name, res);
1263                 rfkill_destroy(atp_rfk->rfkill);
1264                 kfree(atp_rfk);
1265                 return res;
1266         }
1267
1268         tpacpi_rfkill_switches[id] = atp_rfk;
1269         return 0;
1270 }
1271
1272 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1273 {
1274         struct tpacpi_rfk *tp_rfk;
1275
1276         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1277
1278         tp_rfk = tpacpi_rfkill_switches[id];
1279         if (tp_rfk) {
1280                 rfkill_unregister(tp_rfk->rfkill);
1281                 rfkill_destroy(tp_rfk->rfkill);
1282                 tpacpi_rfkill_switches[id] = NULL;
1283                 kfree(tp_rfk);
1284         }
1285 }
1286
1287 static void printk_deprecated_rfkill_attribute(const char * const what)
1288 {
1289         printk_deprecated_attribute(what,
1290                         "Please switch to generic rfkill before year 2010");
1291 }
1292
1293 /* sysfs <radio> enable ------------------------------------------------ */
1294 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1295                                             struct device_attribute *attr,
1296                                             char *buf)
1297 {
1298         int status;
1299
1300         printk_deprecated_rfkill_attribute(attr->attr.name);
1301
1302         /* This is in the ABI... */
1303         if (tpacpi_rfk_check_hwblock_state()) {
1304                 status = TPACPI_RFK_RADIO_OFF;
1305         } else {
1306                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1307                 if (status < 0)
1308                         return status;
1309         }
1310
1311         return snprintf(buf, PAGE_SIZE, "%d\n",
1312                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1313 }
1314
1315 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1316                             struct device_attribute *attr,
1317                             const char *buf, size_t count)
1318 {
1319         unsigned long t;
1320         int res;
1321
1322         printk_deprecated_rfkill_attribute(attr->attr.name);
1323
1324         if (parse_strtoul(buf, 1, &t))
1325                 return -EINVAL;
1326
1327         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1328
1329         /* This is in the ABI... */
1330         if (tpacpi_rfk_check_hwblock_state() && !!t)
1331                 return -EPERM;
1332
1333         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1334                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1335         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1336
1337         return (res < 0) ? res : count;
1338 }
1339
1340 /* procfs -------------------------------------------------------------- */
1341 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
1342 {
1343         int len = 0;
1344
1345         if (id >= TPACPI_RFK_SW_MAX)
1346                 len += sprintf(p + len, "status:\t\tnot supported\n");
1347         else {
1348                 int status;
1349
1350                 /* This is in the ABI... */
1351                 if (tpacpi_rfk_check_hwblock_state()) {
1352                         status = TPACPI_RFK_RADIO_OFF;
1353                 } else {
1354                         status = tpacpi_rfk_update_swstate(
1355                                                 tpacpi_rfkill_switches[id]);
1356                         if (status < 0)
1357                                 return status;
1358                 }
1359
1360                 len += sprintf(p + len, "status:\t\t%s\n",
1361                                 (status == TPACPI_RFK_RADIO_ON) ?
1362                                         "enabled" : "disabled");
1363                 len += sprintf(p + len, "commands:\tenable, disable\n");
1364         }
1365
1366         return len;
1367 }
1368
1369 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1370 {
1371         char *cmd;
1372         int status = -1;
1373         int res = 0;
1374
1375         if (id >= TPACPI_RFK_SW_MAX)
1376                 return -ENODEV;
1377
1378         while ((cmd = next_cmd(&buf))) {
1379                 if (strlencmp(cmd, "enable") == 0)
1380                         status = TPACPI_RFK_RADIO_ON;
1381                 else if (strlencmp(cmd, "disable") == 0)
1382                         status = TPACPI_RFK_RADIO_OFF;
1383                 else
1384                         return -EINVAL;
1385         }
1386
1387         if (status != -1) {
1388                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1389                                 (status == TPACPI_RFK_RADIO_ON) ?
1390                                                 "enable" : "disable",
1391                                 tpacpi_rfkill_names[id]);
1392                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1393                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1394         }
1395
1396         return res;
1397 }
1398
1399 /*************************************************************************
1400  * thinkpad-acpi driver attributes
1401  */
1402
1403 /* interface_version --------------------------------------------------- */
1404 static ssize_t tpacpi_driver_interface_version_show(
1405                                 struct device_driver *drv,
1406                                 char *buf)
1407 {
1408         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1409 }
1410
1411 static DRIVER_ATTR(interface_version, S_IRUGO,
1412                 tpacpi_driver_interface_version_show, NULL);
1413
1414 /* debug_level --------------------------------------------------------- */
1415 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1416                                                 char *buf)
1417 {
1418         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1419 }
1420
1421 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1422                                                 const char *buf, size_t count)
1423 {
1424         unsigned long t;
1425
1426         if (parse_strtoul(buf, 0xffff, &t))
1427                 return -EINVAL;
1428
1429         dbg_level = t;
1430
1431         return count;
1432 }
1433
1434 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1435                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1436
1437 /* version ------------------------------------------------------------- */
1438 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1439                                                 char *buf)
1440 {
1441         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1442                         TPACPI_DESC, TPACPI_VERSION);
1443 }
1444
1445 static DRIVER_ATTR(version, S_IRUGO,
1446                 tpacpi_driver_version_show, NULL);
1447
1448 /* --------------------------------------------------------------------- */
1449
1450 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1451
1452 /* wlsw_emulstate ------------------------------------------------------ */
1453 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1454                                                 char *buf)
1455 {
1456         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1457 }
1458
1459 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1460                                                 const char *buf, size_t count)
1461 {
1462         unsigned long t;
1463
1464         if (parse_strtoul(buf, 1, &t))
1465                 return -EINVAL;
1466
1467         if (tpacpi_wlsw_emulstate != !!t) {
1468                 tpacpi_wlsw_emulstate = !!t;
1469                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1470         }
1471
1472         return count;
1473 }
1474
1475 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1476                 tpacpi_driver_wlsw_emulstate_show,
1477                 tpacpi_driver_wlsw_emulstate_store);
1478
1479 /* bluetooth_emulstate ------------------------------------------------- */
1480 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1481                                         struct device_driver *drv,
1482                                         char *buf)
1483 {
1484         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1485 }
1486
1487 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1488                                         struct device_driver *drv,
1489                                         const char *buf, size_t count)
1490 {
1491         unsigned long t;
1492
1493         if (parse_strtoul(buf, 1, &t))
1494                 return -EINVAL;
1495
1496         tpacpi_bluetooth_emulstate = !!t;
1497
1498         return count;
1499 }
1500
1501 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1502                 tpacpi_driver_bluetooth_emulstate_show,
1503                 tpacpi_driver_bluetooth_emulstate_store);
1504
1505 /* wwan_emulstate ------------------------------------------------- */
1506 static ssize_t tpacpi_driver_wwan_emulstate_show(
1507                                         struct device_driver *drv,
1508                                         char *buf)
1509 {
1510         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1511 }
1512
1513 static ssize_t tpacpi_driver_wwan_emulstate_store(
1514                                         struct device_driver *drv,
1515                                         const char *buf, size_t count)
1516 {
1517         unsigned long t;
1518
1519         if (parse_strtoul(buf, 1, &t))
1520                 return -EINVAL;
1521
1522         tpacpi_wwan_emulstate = !!t;
1523
1524         return count;
1525 }
1526
1527 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1528                 tpacpi_driver_wwan_emulstate_show,
1529                 tpacpi_driver_wwan_emulstate_store);
1530
1531 /* uwb_emulstate ------------------------------------------------- */
1532 static ssize_t tpacpi_driver_uwb_emulstate_show(
1533                                         struct device_driver *drv,
1534                                         char *buf)
1535 {
1536         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1537 }
1538
1539 static ssize_t tpacpi_driver_uwb_emulstate_store(
1540                                         struct device_driver *drv,
1541                                         const char *buf, size_t count)
1542 {
1543         unsigned long t;
1544
1545         if (parse_strtoul(buf, 1, &t))
1546                 return -EINVAL;
1547
1548         tpacpi_uwb_emulstate = !!t;
1549
1550         return count;
1551 }
1552
1553 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1554                 tpacpi_driver_uwb_emulstate_show,
1555                 tpacpi_driver_uwb_emulstate_store);
1556 #endif
1557
1558 /* --------------------------------------------------------------------- */
1559
1560 static struct driver_attribute *tpacpi_driver_attributes[] = {
1561         &driver_attr_debug_level, &driver_attr_version,
1562         &driver_attr_interface_version,
1563 };
1564
1565 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1566 {
1567         int i, res;
1568
1569         i = 0;
1570         res = 0;
1571         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1572                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1573                 i++;
1574         }
1575
1576 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1577         if (!res && dbg_wlswemul)
1578                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1579         if (!res && dbg_bluetoothemul)
1580                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1581         if (!res && dbg_wwanemul)
1582                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1583         if (!res && dbg_uwbemul)
1584                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1585 #endif
1586
1587         return res;
1588 }
1589
1590 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1591 {
1592         int i;
1593
1594         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1595                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1596
1597 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1598         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1599         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1600         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1601         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1602 #endif
1603 }
1604
1605 /*************************************************************************
1606  * Firmware Data
1607  */
1608
1609 /*
1610  * Table of recommended minimum BIOS versions
1611  *
1612  * Reasons for listing:
1613  *    1. Stable BIOS, listed because the unknown ammount of
1614  *       bugs and bad ACPI behaviour on older versions
1615  *
1616  *    2. BIOS or EC fw with known bugs that trigger on Linux
1617  *
1618  *    3. BIOS with known reduced functionality in older versions
1619  *
1620  *  We recommend the latest BIOS and EC version.
1621  *  We only support the latest BIOS and EC fw version as a rule.
1622  *
1623  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1624  *  Information from users in ThinkWiki
1625  *
1626  *  WARNING: we use this table also to detect that the machine is
1627  *  a ThinkPad in some cases, so don't remove entries lightly.
1628  */
1629
1630 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1631         { .vendor       = (__v),                        \
1632           .bios         = TPID(__id1, __id2),           \
1633           .ec           = TPACPI_MATCH_ANY,             \
1634           .quirks       = TPACPI_MATCH_ANY << 16        \
1635                           | (__bv1) << 8 | (__bv2) }
1636
1637 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1638                 __eid1, __eid2, __ev1, __ev2)           \
1639         { .vendor       = (__v),                        \
1640           .bios         = TPID(__bid1, __bid2),         \
1641           .ec           = TPID(__eid1, __eid2),         \
1642           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1643                           | (__bv1) << 8 | (__bv2) }
1644
1645 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1646         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1647
1648 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1649         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1650                 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1651
1652 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1653                 __eid1, __eid2, __ev1, __ev2)           \
1654         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1655                 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1656
1657 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1658         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1659
1660 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1661         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1662                 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1663
1664 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1665                 __eid1, __eid2, __ev1, __ev2)           \
1666         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1667                 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1668
1669 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1670         /*  Numeric models ------------------ */
1671         /*      FW MODEL   BIOS VERS          */
1672         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1673         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1674         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1675         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1676         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1677         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1678         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1679         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1680         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1681
1682         /* A-series ------------------------- */
1683         /*      FW MODEL   BIOS VERS  EC VERS */
1684         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1685         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1686         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1687         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1688         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1689         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1690         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1691         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1692         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1693         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1694         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1695
1696         /* G-series ------------------------- */
1697         /*      FW MODEL   BIOS VERS          */
1698         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1699         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1700
1701         /* R-series, T-series --------------- */
1702         /*      FW MODEL   BIOS VERS  EC VERS */
1703         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1704         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1705         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1706         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1707         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1708         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1709         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1710                                                     T40/p, T41/p, T42/p (1) */
1711         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1712         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1713         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1714         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1715
1716         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1717         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1718         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1719         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1720         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1721         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1722
1723         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1724         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1725         TPV_QL0('7', 'E',  'D', '0'),            /* R60e, R60i */
1726
1727         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1728         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1729         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1730
1731         /* X-series ------------------------- */
1732         /*      FW MODEL   BIOS VERS  EC VERS */
1733         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1734         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1735         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1736         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1737         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1738         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1739         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1740
1741         TPV_QL0('7', 'B',  'D', '7'),            /* X60/s */
1742         TPV_QL0('7', 'J',  '3', '0'),            /* X60t */
1743
1744         /* (0) - older versions lack DMI EC fw string and functionality */
1745         /* (1) - older versions known to lack functionality */
1746 };
1747
1748 #undef TPV_QL1
1749 #undef TPV_QL0
1750 #undef TPV_QI2
1751 #undef TPV_QI1
1752 #undef TPV_QI0
1753 #undef TPV_Q_X
1754 #undef TPV_Q
1755
1756 static void __init tpacpi_check_outdated_fw(void)
1757 {
1758         unsigned long fwvers;
1759         u16 ec_version, bios_version;
1760
1761         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1762                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1763
1764         if (!fwvers)
1765                 return;
1766
1767         bios_version = fwvers & 0xffffU;
1768         ec_version = (fwvers >> 16) & 0xffffU;
1769
1770         /* note that unknown versions are set to 0x0000 and we use that */
1771         if ((bios_version > thinkpad_id.bios_release) ||
1772             (ec_version > thinkpad_id.ec_release &&
1773                                 ec_version != TPACPI_MATCH_ANY)) {
1774                 /*
1775                  * The changelogs would let us track down the exact
1776                  * reason, but it is just too much of a pain to track
1777                  * it.  We only list BIOSes that are either really
1778                  * broken, or really stable to begin with, so it is
1779                  * best if the user upgrades the firmware anyway.
1780                  */
1781                 printk(TPACPI_WARN
1782                         "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1783                 printk(TPACPI_WARN
1784                         "WARNING: This firmware may be missing critical bug "
1785                         "fixes and/or important features\n");
1786         }
1787 }
1788
1789 static bool __init tpacpi_is_fw_known(void)
1790 {
1791         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1792                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1793 }
1794
1795 /****************************************************************************
1796  ****************************************************************************
1797  *
1798  * Subdrivers
1799  *
1800  ****************************************************************************
1801  ****************************************************************************/
1802
1803 /*************************************************************************
1804  * thinkpad-acpi init subdriver
1805  */
1806
1807 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1808 {
1809         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1810         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1811
1812         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1813                 (thinkpad_id.bios_version_str) ?
1814                         thinkpad_id.bios_version_str : "unknown",
1815                 (thinkpad_id.ec_version_str) ?
1816                         thinkpad_id.ec_version_str : "unknown");
1817
1818         if (thinkpad_id.vendor && thinkpad_id.model_str)
1819                 printk(TPACPI_INFO "%s %s, model %s\n",
1820                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1821                                 "IBM" : ((thinkpad_id.vendor ==
1822                                                 PCI_VENDOR_ID_LENOVO) ?
1823                                         "Lenovo" : "Unknown vendor"),
1824                         thinkpad_id.model_str,
1825                         (thinkpad_id.nummodel_str) ?
1826                                 thinkpad_id.nummodel_str : "unknown");
1827
1828         tpacpi_check_outdated_fw();
1829         return 0;
1830 }
1831
1832 static int thinkpad_acpi_driver_read(char *p)
1833 {
1834         int len = 0;
1835
1836         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1837         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1838
1839         return len;
1840 }
1841
1842 static struct ibm_struct thinkpad_acpi_driver_data = {
1843         .name = "driver",
1844         .read = thinkpad_acpi_driver_read,
1845 };
1846
1847 /*************************************************************************
1848  * Hotkey subdriver
1849  */
1850
1851 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1852         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1853         TP_ACPI_HOTKEYSCAN_FNF2,
1854         TP_ACPI_HOTKEYSCAN_FNF3,
1855         TP_ACPI_HOTKEYSCAN_FNF4,
1856         TP_ACPI_HOTKEYSCAN_FNF5,
1857         TP_ACPI_HOTKEYSCAN_FNF6,
1858         TP_ACPI_HOTKEYSCAN_FNF7,
1859         TP_ACPI_HOTKEYSCAN_FNF8,
1860         TP_ACPI_HOTKEYSCAN_FNF9,
1861         TP_ACPI_HOTKEYSCAN_FNF10,
1862         TP_ACPI_HOTKEYSCAN_FNF11,
1863         TP_ACPI_HOTKEYSCAN_FNF12,
1864         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1865         TP_ACPI_HOTKEYSCAN_FNINSERT,
1866         TP_ACPI_HOTKEYSCAN_FNDELETE,
1867         TP_ACPI_HOTKEYSCAN_FNHOME,
1868         TP_ACPI_HOTKEYSCAN_FNEND,
1869         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1870         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1871         TP_ACPI_HOTKEYSCAN_FNSPACE,
1872         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1873         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1874         TP_ACPI_HOTKEYSCAN_MUTE,
1875         TP_ACPI_HOTKEYSCAN_THINKPAD,
1876 };
1877
1878 enum {  /* Keys available through NVRAM polling */
1879         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1880         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1881 };
1882
1883 enum {  /* Positions of some of the keys in hotkey masks */
1884         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1885         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1886         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1887         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1888         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1889         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1890         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1891         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1892         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1893         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1894         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1895 };
1896
1897 enum {  /* NVRAM to ACPI HKEY group map */
1898         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1899                                           TP_ACPI_HKEY_ZOOM_MASK |
1900                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1901                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1902         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1903                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1904         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1905                                           TP_ACPI_HKEY_VOLDWN_MASK |
1906                                           TP_ACPI_HKEY_MUTE_MASK,
1907 };
1908
1909 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1910 struct tp_nvram_state {
1911        u16 thinkpad_toggle:1;
1912        u16 zoom_toggle:1;
1913        u16 display_toggle:1;
1914        u16 thinklight_toggle:1;
1915        u16 hibernate_toggle:1;
1916        u16 displayexp_toggle:1;
1917        u16 display_state:1;
1918        u16 brightness_toggle:1;
1919        u16 volume_toggle:1;
1920        u16 mute:1;
1921
1922        u8 brightness_level;
1923        u8 volume_level;
1924 };
1925
1926 /* kthread for the hotkey poller */
1927 static struct task_struct *tpacpi_hotkey_task;
1928
1929 /* Acquired while the poller kthread is running, use to sync start/stop */
1930 static struct mutex hotkey_thread_mutex;
1931
1932 /*
1933  * Acquire mutex to write poller control variables.
1934  * Increment hotkey_config_change when changing them.
1935  *
1936  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1937  */
1938 static struct mutex hotkey_thread_data_mutex;
1939 static unsigned int hotkey_config_change;
1940
1941 /*
1942  * hotkey poller control variables
1943  *
1944  * Must be atomic or readers will also need to acquire mutex
1945  */
1946 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1947 static unsigned int hotkey_poll_freq = 10; /* Hz */
1948
1949 #define HOTKEY_CONFIG_CRITICAL_START \
1950         do { \
1951                 mutex_lock(&hotkey_thread_data_mutex); \
1952                 hotkey_config_change++; \
1953         } while (0);
1954 #define HOTKEY_CONFIG_CRITICAL_END \
1955         mutex_unlock(&hotkey_thread_data_mutex);
1956
1957 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1958
1959 #define hotkey_source_mask 0U
1960 #define HOTKEY_CONFIG_CRITICAL_START
1961 #define HOTKEY_CONFIG_CRITICAL_END
1962
1963 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1964
1965 static struct mutex hotkey_mutex;
1966
1967 static enum {   /* Reasons for waking up */
1968         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1969         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1970         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1971 } hotkey_wakeup_reason;
1972
1973 static int hotkey_autosleep_ack;
1974
1975 static u32 hotkey_orig_mask;
1976 static u32 hotkey_all_mask;
1977 static u32 hotkey_reserved_mask;
1978 static u32 hotkey_mask;
1979
1980 static unsigned int hotkey_report_mode;
1981
1982 static u16 *hotkey_keycode_map;
1983
1984 static struct attribute_set *hotkey_dev_attributes;
1985
1986 /* HKEY.MHKG() return bits */
1987 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1988
1989 static int hotkey_get_wlsw(void)
1990 {
1991         int status;
1992
1993         if (!tp_features.hotkey_wlsw)
1994                 return -ENODEV;
1995
1996 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1997         if (dbg_wlswemul)
1998                 return (tpacpi_wlsw_emulstate) ?
1999                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2000 #endif
2001
2002         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2003                 return -EIO;
2004
2005         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2006 }
2007
2008 static int hotkey_get_tablet_mode(int *status)
2009 {
2010         int s;
2011
2012         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2013                 return -EIO;
2014
2015         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2016         return 0;
2017 }
2018
2019 /*
2020  * Call with hotkey_mutex held
2021  */
2022 static int hotkey_mask_get(void)
2023 {
2024         u32 m = 0;
2025
2026         if (tp_features.hotkey_mask) {
2027                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2028                         return -EIO;
2029         }
2030         HOTKEY_CONFIG_CRITICAL_START
2031         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
2032         HOTKEY_CONFIG_CRITICAL_END
2033
2034         return 0;
2035 }
2036
2037 /*
2038  * Call with hotkey_mutex held
2039  */
2040 static int hotkey_mask_set(u32 mask)
2041 {
2042         int i;
2043         int rc = 0;
2044
2045         if (tp_features.hotkey_mask) {
2046                 if (!tp_warned.hotkey_mask_ff &&
2047                     (mask == 0xffff || mask == 0xffffff ||
2048                      mask == 0xffffffff)) {
2049                         tp_warned.hotkey_mask_ff = 1;
2050                         printk(TPACPI_NOTICE
2051                                "setting the hotkey mask to 0x%08x is likely "
2052                                "not the best way to go about it\n", mask);
2053                         printk(TPACPI_NOTICE
2054                                "please consider using the driver defaults, "
2055                                "and refer to up-to-date thinkpad-acpi "
2056                                "documentation\n");
2057                 }
2058
2059                 HOTKEY_CONFIG_CRITICAL_START
2060                 for (i = 0; i < 32; i++) {
2061                         u32 m = 1 << i;
2062                         /* enable in firmware mask only keys not in NVRAM
2063                          * mode, but enable the key in the cached hotkey_mask
2064                          * regardless of mode, or the key will end up
2065                          * disabled by hotkey_mask_get() */
2066                         if (!acpi_evalf(hkey_handle,
2067                                         NULL, "MHKM", "vdd", i + 1,
2068                                         !!((mask & ~hotkey_source_mask) & m))) {
2069                                 rc = -EIO;
2070                                 break;
2071                         } else {
2072                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
2073                         }
2074                 }
2075                 HOTKEY_CONFIG_CRITICAL_END
2076
2077                 /* hotkey_mask_get must be called unconditionally below */
2078                 if (!hotkey_mask_get() && !rc &&
2079                     (hotkey_mask & ~hotkey_source_mask) !=
2080                      (mask & ~hotkey_source_mask)) {
2081                         printk(TPACPI_NOTICE
2082                                "requested hot key mask 0x%08x, but "
2083                                "firmware forced it to 0x%08x\n",
2084                                mask, hotkey_mask);
2085                 }
2086         } else {
2087 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2088                 HOTKEY_CONFIG_CRITICAL_START
2089                 hotkey_mask = mask & hotkey_source_mask;
2090                 HOTKEY_CONFIG_CRITICAL_END
2091                 hotkey_mask_get();
2092                 if (hotkey_mask != mask) {
2093                         printk(TPACPI_NOTICE
2094                                "requested hot key mask 0x%08x, "
2095                                "forced to 0x%08x (NVRAM poll mask is "
2096                                "0x%08x): no firmware mask support\n",
2097                                mask, hotkey_mask, hotkey_source_mask);
2098                 }
2099 #else
2100                 hotkey_mask_get();
2101                 rc = -ENXIO;
2102 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2103         }
2104
2105         return rc;
2106 }
2107
2108 static int hotkey_status_get(int *status)
2109 {
2110         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2111                 return -EIO;
2112
2113         return 0;
2114 }
2115
2116 static int hotkey_status_set(bool enable)
2117 {
2118         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2119                 return -EIO;
2120
2121         return 0;
2122 }
2123
2124 static void tpacpi_input_send_tabletsw(void)
2125 {
2126         int state;
2127
2128         if (tp_features.hotkey_tablet &&
2129             !hotkey_get_tablet_mode(&state)) {
2130                 mutex_lock(&tpacpi_inputdev_send_mutex);
2131
2132                 input_report_switch(tpacpi_inputdev,
2133                                     SW_TABLET_MODE, !!state);
2134                 input_sync(tpacpi_inputdev);
2135
2136                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2137         }
2138 }
2139
2140 static void tpacpi_input_send_key(unsigned int scancode)
2141 {
2142         unsigned int keycode;
2143
2144         keycode = hotkey_keycode_map[scancode];
2145
2146         if (keycode != KEY_RESERVED) {
2147                 mutex_lock(&tpacpi_inputdev_send_mutex);
2148
2149                 input_report_key(tpacpi_inputdev, keycode, 1);
2150                 if (keycode == KEY_UNKNOWN)
2151                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2152                                     scancode);
2153                 input_sync(tpacpi_inputdev);
2154
2155                 input_report_key(tpacpi_inputdev, keycode, 0);
2156                 if (keycode == KEY_UNKNOWN)
2157                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2158                                     scancode);
2159                 input_sync(tpacpi_inputdev);
2160
2161                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2162         }
2163 }
2164
2165 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2166 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2167
2168 static void tpacpi_hotkey_send_key(unsigned int scancode)
2169 {
2170         tpacpi_input_send_key(scancode);
2171         if (hotkey_report_mode < 2) {
2172                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2173                                                 0x80, 0x1001 + scancode);
2174         }
2175 }
2176
2177 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
2178 {
2179         u8 d;
2180
2181         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2182                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2183                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2184                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2185                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2186                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2187         }
2188         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2189                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2190                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2191         }
2192         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2193                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2194                 n->displayexp_toggle =
2195                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2196         }
2197         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2198                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2199                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2200                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2201                 n->brightness_toggle =
2202                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2203         }
2204         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2205                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2206                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2207                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2208                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2209                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2210         }
2211 }
2212
2213 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2214         do { \
2215                 if ((mask & (1 << __scancode)) && \
2216                     oldn->__member != newn->__member) \
2217                 tpacpi_hotkey_send_key(__scancode); \
2218         } while (0)
2219
2220 #define TPACPI_MAY_SEND_KEY(__scancode) \
2221         do { if (mask & (1 << __scancode)) \
2222                 tpacpi_hotkey_send_key(__scancode); } while (0)
2223
2224 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2225                                            struct tp_nvram_state *newn,
2226                                            u32 mask)
2227 {
2228         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2229         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2230         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2231         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2232
2233         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2234
2235         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2236
2237         /* handle volume */
2238         if (oldn->volume_toggle != newn->volume_toggle) {
2239                 if (oldn->mute != newn->mute) {
2240                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2241                 }
2242                 if (oldn->volume_level > newn->volume_level) {
2243                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2244                 } else if (oldn->volume_level < newn->volume_level) {
2245                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2246                 } else if (oldn->mute == newn->mute) {
2247                         /* repeated key presses that didn't change state */
2248                         if (newn->mute) {
2249                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2250                         } else if (newn->volume_level != 0) {
2251                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2252                         } else {
2253                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2254                         }
2255                 }
2256         }
2257
2258         /* handle brightness */
2259         if (oldn->brightness_toggle != newn->brightness_toggle) {
2260                 if (oldn->brightness_level < newn->brightness_level) {
2261                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2262                 } else if (oldn->brightness_level > newn->brightness_level) {
2263                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2264                 } else {
2265                         /* repeated key presses that didn't change state */
2266                         if (newn->brightness_level != 0) {
2267                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2268                         } else {
2269                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2270                         }
2271                 }
2272         }
2273 }
2274
2275 #undef TPACPI_COMPARE_KEY
2276 #undef TPACPI_MAY_SEND_KEY
2277
2278 static int hotkey_kthread(void *data)
2279 {
2280         struct tp_nvram_state s[2];
2281         u32 mask;
2282         unsigned int si, so;
2283         unsigned long t;
2284         unsigned int change_detector, must_reset;
2285         unsigned int poll_freq;
2286
2287         mutex_lock(&hotkey_thread_mutex);
2288
2289         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2290                 goto exit;
2291
2292         set_freezable();
2293
2294         so = 0;
2295         si = 1;
2296         t = 0;
2297
2298         /* Initial state for compares */
2299         mutex_lock(&hotkey_thread_data_mutex);
2300         change_detector = hotkey_config_change;
2301         mask = hotkey_source_mask & hotkey_mask;
2302         poll_freq = hotkey_poll_freq;
2303         mutex_unlock(&hotkey_thread_data_mutex);
2304         hotkey_read_nvram(&s[so], mask);
2305
2306         while (!kthread_should_stop()) {
2307                 if (t == 0) {
2308                         if (likely(poll_freq))
2309                                 t = 1000/poll_freq;
2310                         else
2311                                 t = 100;        /* should never happen... */
2312                 }
2313                 t = msleep_interruptible(t);
2314                 if (unlikely(kthread_should_stop()))
2315                         break;
2316                 must_reset = try_to_freeze();
2317                 if (t > 0 && !must_reset)
2318                         continue;
2319
2320                 mutex_lock(&hotkey_thread_data_mutex);
2321                 if (must_reset || hotkey_config_change != change_detector) {
2322                         /* forget old state on thaw or config change */
2323                         si = so;
2324                         t = 0;
2325                         change_detector = hotkey_config_change;
2326                 }
2327                 mask = hotkey_source_mask & hotkey_mask;
2328                 poll_freq = hotkey_poll_freq;
2329                 mutex_unlock(&hotkey_thread_data_mutex);
2330
2331                 if (likely(mask)) {
2332                         hotkey_read_nvram(&s[si], mask);
2333                         if (likely(si != so)) {
2334                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2335                                                                 mask);
2336                         }
2337                 }
2338
2339                 so = si;
2340                 si ^= 1;
2341         }
2342
2343 exit:
2344         mutex_unlock(&hotkey_thread_mutex);
2345         return 0;
2346 }
2347
2348 /* call with hotkey_mutex held */
2349 static void hotkey_poll_stop_sync(void)
2350 {
2351         if (tpacpi_hotkey_task) {
2352                 if (frozen(tpacpi_hotkey_task) ||
2353                     freezing(tpacpi_hotkey_task))
2354                         thaw_process(tpacpi_hotkey_task);
2355
2356                 kthread_stop(tpacpi_hotkey_task);
2357                 tpacpi_hotkey_task = NULL;
2358                 mutex_lock(&hotkey_thread_mutex);
2359                 /* at this point, the thread did exit */
2360                 mutex_unlock(&hotkey_thread_mutex);
2361         }
2362 }
2363
2364 /* call with hotkey_mutex held */
2365 static void hotkey_poll_setup(bool may_warn)
2366 {
2367         u32 hotkeys_to_poll = hotkey_source_mask & hotkey_mask;
2368
2369         if (hotkeys_to_poll != 0 && hotkey_poll_freq > 0 &&
2370             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
2371                 if (!tpacpi_hotkey_task) {
2372                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2373                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2374                         if (IS_ERR(tpacpi_hotkey_task)) {
2375                                 tpacpi_hotkey_task = NULL;
2376                                 printk(TPACPI_ERR
2377                                        "could not create kernel thread "
2378                                        "for hotkey polling\n");
2379                         }
2380                 }
2381         } else {
2382                 hotkey_poll_stop_sync();
2383                 if (may_warn && hotkeys_to_poll != 0 &&
2384                     hotkey_poll_freq == 0) {
2385                         printk(TPACPI_NOTICE
2386                                 "hot keys 0x%08x require polling, "
2387                                 "which is currently disabled\n",
2388                                 hotkeys_to_poll);
2389                 }
2390         }
2391 }
2392
2393 static void hotkey_poll_setup_safe(bool may_warn)
2394 {
2395         mutex_lock(&hotkey_mutex);
2396         hotkey_poll_setup(may_warn);
2397         mutex_unlock(&hotkey_mutex);
2398 }
2399
2400 /* call with hotkey_mutex held */
2401 static void hotkey_poll_set_freq(unsigned int freq)
2402 {
2403         if (!freq)
2404                 hotkey_poll_stop_sync();
2405
2406         HOTKEY_CONFIG_CRITICAL_START
2407         hotkey_poll_freq = freq;
2408         HOTKEY_CONFIG_CRITICAL_END
2409 }
2410
2411 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2412
2413 static void hotkey_poll_setup_safe(bool __unused)
2414 {
2415 }
2416
2417 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2418
2419 static int hotkey_inputdev_open(struct input_dev *dev)
2420 {
2421         switch (tpacpi_lifecycle) {
2422         case TPACPI_LIFE_INIT:
2423                 /*
2424                  * hotkey_init will call hotkey_poll_setup_safe
2425                  * at the appropriate moment
2426                  */
2427                 return 0;
2428         case TPACPI_LIFE_EXITING:
2429                 return -EBUSY;
2430         case TPACPI_LIFE_RUNNING:
2431                 hotkey_poll_setup_safe(false);
2432                 return 0;
2433         }
2434
2435         /* Should only happen if tpacpi_lifecycle is corrupt */
2436         BUG();
2437         return -EBUSY;
2438 }
2439
2440 static void hotkey_inputdev_close(struct input_dev *dev)
2441 {
2442         /* disable hotkey polling when possible */
2443         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
2444                 hotkey_poll_setup_safe(false);
2445 }
2446
2447 /* sysfs hotkey enable ------------------------------------------------- */
2448 static ssize_t hotkey_enable_show(struct device *dev,
2449                            struct device_attribute *attr,
2450                            char *buf)
2451 {
2452         int res, status;
2453
2454         printk_deprecated_attribute("hotkey_enable",
2455                         "Hotkey reporting is always enabled");
2456
2457         res = hotkey_status_get(&status);
2458         if (res)
2459                 return res;
2460
2461         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2462 }
2463
2464 static ssize_t hotkey_enable_store(struct device *dev,
2465                             struct device_attribute *attr,
2466                             const char *buf, size_t count)
2467 {
2468         unsigned long t;
2469
2470         printk_deprecated_attribute("hotkey_enable",
2471                         "Hotkeys can be disabled through hotkey_mask");
2472
2473         if (parse_strtoul(buf, 1, &t))
2474                 return -EINVAL;
2475
2476         if (t == 0)
2477                 return -EPERM;
2478
2479         return count;
2480 }
2481
2482 static struct device_attribute dev_attr_hotkey_enable =
2483         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2484                 hotkey_enable_show, hotkey_enable_store);
2485
2486 /* sysfs hotkey mask --------------------------------------------------- */
2487 static ssize_t hotkey_mask_show(struct device *dev,
2488                            struct device_attribute *attr,
2489                            char *buf)
2490 {
2491         int res;
2492
2493         if (mutex_lock_killable(&hotkey_mutex))
2494                 return -ERESTARTSYS;
2495         res = hotkey_mask_get();
2496         mutex_unlock(&hotkey_mutex);
2497
2498         return (res)?
2499                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
2500 }
2501
2502 static ssize_t hotkey_mask_store(struct device *dev,
2503                             struct device_attribute *attr,
2504                             const char *buf, size_t count)
2505 {
2506         unsigned long t;
2507         int res;
2508
2509         if (parse_strtoul(buf, 0xffffffffUL, &t))
2510                 return -EINVAL;
2511
2512         if (mutex_lock_killable(&hotkey_mutex))
2513                 return -ERESTARTSYS;
2514
2515         res = hotkey_mask_set(t);
2516
2517 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2518         hotkey_poll_setup(true);
2519 #endif
2520
2521         mutex_unlock(&hotkey_mutex);
2522
2523         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2524
2525         return (res) ? res : count;
2526 }
2527
2528 static struct device_attribute dev_attr_hotkey_mask =
2529         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2530                 hotkey_mask_show, hotkey_mask_store);
2531
2532 /* sysfs hotkey bios_enabled ------------------------------------------- */
2533 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2534                            struct device_attribute *attr,
2535                            char *buf)
2536 {
2537         return sprintf(buf, "0\n");
2538 }
2539
2540 static struct device_attribute dev_attr_hotkey_bios_enabled =
2541         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2542
2543 /* sysfs hotkey bios_mask ---------------------------------------------- */
2544 static ssize_t hotkey_bios_mask_show(struct device *dev,
2545                            struct device_attribute *attr,
2546                            char *buf)
2547 {
2548         printk_deprecated_attribute("hotkey_bios_mask",
2549                         "This attribute is useless.");
2550         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2551 }
2552
2553 static struct device_attribute dev_attr_hotkey_bios_mask =
2554         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2555
2556 /* sysfs hotkey all_mask ----------------------------------------------- */
2557 static ssize_t hotkey_all_mask_show(struct device *dev,
2558                            struct device_attribute *attr,
2559                            char *buf)
2560 {
2561         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2562                                 hotkey_all_mask | hotkey_source_mask);
2563 }
2564
2565 static struct device_attribute dev_attr_hotkey_all_mask =
2566         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2567
2568 /* sysfs hotkey recommended_mask --------------------------------------- */
2569 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2570                                             struct device_attribute *attr,
2571                                             char *buf)
2572 {
2573         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2574                         (hotkey_all_mask | hotkey_source_mask)
2575                         & ~hotkey_reserved_mask);
2576 }
2577
2578 static struct device_attribute dev_attr_hotkey_recommended_mask =
2579         __ATTR(hotkey_recommended_mask, S_IRUGO,
2580                 hotkey_recommended_mask_show, NULL);
2581
2582 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2583
2584 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2585 static ssize_t hotkey_source_mask_show(struct device *dev,
2586                            struct device_attribute *attr,
2587                            char *buf)
2588 {
2589         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2590 }
2591
2592 static ssize_t hotkey_source_mask_store(struct device *dev,
2593                             struct device_attribute *attr,
2594                             const char *buf, size_t count)
2595 {
2596         unsigned long t;
2597
2598         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2599                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2600                 return -EINVAL;
2601
2602         if (mutex_lock_killable(&hotkey_mutex))
2603                 return -ERESTARTSYS;
2604
2605         HOTKEY_CONFIG_CRITICAL_START
2606         hotkey_source_mask = t;
2607         HOTKEY_CONFIG_CRITICAL_END
2608
2609         hotkey_poll_setup(true);
2610         hotkey_mask_set(hotkey_mask);
2611
2612         mutex_unlock(&hotkey_mutex);
2613
2614         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2615
2616         return count;
2617 }
2618
2619 static struct device_attribute dev_attr_hotkey_source_mask =
2620         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2621                 hotkey_source_mask_show, hotkey_source_mask_store);
2622
2623 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2624 static ssize_t hotkey_poll_freq_show(struct device *dev,
2625                            struct device_attribute *attr,
2626                            char *buf)
2627 {
2628         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2629 }
2630
2631 static ssize_t hotkey_poll_freq_store(struct device *dev,
2632                             struct device_attribute *attr,
2633                             const char *buf, size_t count)
2634 {
2635         unsigned long t;
2636
2637         if (parse_strtoul(buf, 25, &t))
2638                 return -EINVAL;
2639
2640         if (mutex_lock_killable(&hotkey_mutex))
2641                 return -ERESTARTSYS;
2642
2643         hotkey_poll_set_freq(t);
2644         hotkey_poll_setup(true);
2645
2646         mutex_unlock(&hotkey_mutex);
2647
2648         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2649
2650         return count;
2651 }
2652
2653 static struct device_attribute dev_attr_hotkey_poll_freq =
2654         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2655                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2656
2657 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2658
2659 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2660 static ssize_t hotkey_radio_sw_show(struct device *dev,
2661                            struct device_attribute *attr,
2662                            char *buf)
2663 {
2664         int res;
2665         res = hotkey_get_wlsw();
2666         if (res < 0)
2667                 return res;
2668
2669         /* Opportunistic update */
2670         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2671
2672         return snprintf(buf, PAGE_SIZE, "%d\n",
2673                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2674 }
2675
2676 static struct device_attribute dev_attr_hotkey_radio_sw =
2677         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2678
2679 static void hotkey_radio_sw_notify_change(void)
2680 {
2681         if (tp_features.hotkey_wlsw)
2682                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2683                              "hotkey_radio_sw");
2684 }
2685
2686 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2687 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2688                            struct device_attribute *attr,
2689                            char *buf)
2690 {
2691         int res, s;
2692         res = hotkey_get_tablet_mode(&s);
2693         if (res < 0)
2694                 return res;
2695
2696         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2697 }
2698
2699 static struct device_attribute dev_attr_hotkey_tablet_mode =
2700         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2701
2702 static void hotkey_tablet_mode_notify_change(void)
2703 {
2704         if (tp_features.hotkey_tablet)
2705                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2706                              "hotkey_tablet_mode");
2707 }
2708
2709 /* sysfs hotkey report_mode -------------------------------------------- */
2710 static ssize_t hotkey_report_mode_show(struct device *dev,
2711                            struct device_attribute *attr,
2712                            char *buf)
2713 {
2714         return snprintf(buf, PAGE_SIZE, "%d\n",
2715                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2716 }
2717
2718 static struct device_attribute dev_attr_hotkey_report_mode =
2719         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2720
2721 /* sysfs wakeup reason (pollable) -------------------------------------- */
2722 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2723                            struct device_attribute *attr,
2724                            char *buf)
2725 {
2726         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2727 }
2728
2729 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2730         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2731
2732 static void hotkey_wakeup_reason_notify_change(void)
2733 {
2734         if (tp_features.hotkey_mask)
2735                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2736                              "wakeup_reason");
2737 }
2738
2739 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2740 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2741                            struct device_attribute *attr,
2742                            char *buf)
2743 {
2744         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2745 }
2746
2747 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2748         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2749                hotkey_wakeup_hotunplug_complete_show, NULL);
2750
2751 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2752 {
2753         if (tp_features.hotkey_mask)
2754                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2755                              "wakeup_hotunplug_complete");
2756 }
2757
2758 /* --------------------------------------------------------------------- */
2759
2760 static struct attribute *hotkey_attributes[] __initdata = {
2761         &dev_attr_hotkey_enable.attr,
2762         &dev_attr_hotkey_bios_enabled.attr,
2763         &dev_attr_hotkey_report_mode.attr,
2764 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2765         &dev_attr_hotkey_mask.attr,
2766         &dev_attr_hotkey_all_mask.attr,
2767         &dev_attr_hotkey_recommended_mask.attr,
2768         &dev_attr_hotkey_source_mask.attr,
2769         &dev_attr_hotkey_poll_freq.attr,
2770 #endif
2771 };
2772
2773 static struct attribute *hotkey_mask_attributes[] __initdata = {
2774         &dev_attr_hotkey_bios_mask.attr,
2775 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2776         &dev_attr_hotkey_mask.attr,
2777         &dev_attr_hotkey_all_mask.attr,
2778         &dev_attr_hotkey_recommended_mask.attr,
2779 #endif
2780         &dev_attr_hotkey_wakeup_reason.attr,
2781         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2782 };
2783
2784 /*
2785  * Sync both the hw and sw blocking state of all switches
2786  */
2787 static void tpacpi_send_radiosw_update(void)
2788 {
2789         int wlsw;
2790
2791         /*
2792          * We must sync all rfkill controllers *before* issuing any
2793          * rfkill input events, or we will race the rfkill core input
2794          * handler.
2795          *
2796          * tpacpi_inputdev_send_mutex works as a syncronization point
2797          * for the above.
2798          *
2799          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2800          */
2801
2802         wlsw = hotkey_get_wlsw();
2803
2804         /* Sync hw blocking state first if it is hw-blocked */
2805         if (wlsw == TPACPI_RFK_RADIO_OFF)
2806                 tpacpi_rfk_update_hwblock_state(true);
2807
2808         /* Sync sw blocking state */
2809         tpacpi_rfk_update_swstate_all();
2810
2811         /* Sync hw blocking state last if it is hw-unblocked */
2812         if (wlsw == TPACPI_RFK_RADIO_ON)
2813                 tpacpi_rfk_update_hwblock_state(false);
2814
2815         /* Issue rfkill input event for WLSW switch */
2816         if (!(wlsw < 0)) {
2817                 mutex_lock(&tpacpi_inputdev_send_mutex);
2818
2819                 input_report_switch(tpacpi_inputdev,
2820                                     SW_RFKILL_ALL, (wlsw > 0));
2821                 input_sync(tpacpi_inputdev);
2822
2823                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2824         }
2825
2826         /*
2827          * this can be unconditional, as we will poll state again
2828          * if userspace uses the notify to read data
2829          */
2830         hotkey_radio_sw_notify_change();
2831 }
2832
2833 static void hotkey_exit(void)
2834 {
2835 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2836         mutex_lock(&hotkey_mutex);
2837         hotkey_poll_stop_sync();
2838         mutex_unlock(&hotkey_mutex);
2839 #endif
2840
2841         if (hotkey_dev_attributes)
2842                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2843
2844         kfree(hotkey_keycode_map);
2845
2846         if (tp_features.hotkey) {
2847                 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2848                            "restoring original hot key mask\n");
2849                 /* no short-circuit boolean operator below! */
2850                 if ((hotkey_mask_set(hotkey_orig_mask) |
2851                      hotkey_status_set(false)) != 0)
2852                         printk(TPACPI_ERR
2853                                "failed to restore hot key mask "
2854                                "to BIOS defaults\n");
2855         }
2856 }
2857
2858 static void __init hotkey_unmap(const unsigned int scancode)
2859 {
2860         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
2861                 clear_bit(hotkey_keycode_map[scancode],
2862                           tpacpi_inputdev->keybit);
2863                 hotkey_keycode_map[scancode] = KEY_RESERVED;
2864         }
2865 }
2866
2867 static int __init hotkey_init(struct ibm_init_struct *iibm)
2868 {
2869         /* Requirements for changing the default keymaps:
2870          *
2871          * 1. Many of the keys are mapped to KEY_RESERVED for very
2872          *    good reasons.  Do not change them unless you have deep
2873          *    knowledge on the IBM and Lenovo ThinkPad firmware for
2874          *    the various ThinkPad models.  The driver behaves
2875          *    differently for KEY_RESERVED: such keys have their
2876          *    hot key mask *unset* in mask_recommended, and also
2877          *    in the initial hot key mask programmed into the
2878          *    firmware at driver load time, which means the firm-
2879          *    ware may react very differently if you change them to
2880          *    something else;
2881          *
2882          * 2. You must be subscribed to the linux-thinkpad and
2883          *    ibm-acpi-devel mailing lists, and you should read the
2884          *    list archives since 2007 if you want to change the
2885          *    keymaps.  This requirement exists so that you will
2886          *    know the past history of problems with the thinkpad-
2887          *    acpi driver keymaps, and also that you will be
2888          *    listening to any bug reports;
2889          *
2890          * 3. Do not send thinkpad-acpi specific patches directly to
2891          *    for merging, *ever*.  Send them to the linux-acpi
2892          *    mailinglist for comments.  Merging is to be done only
2893          *    through acpi-test and the ACPI maintainer.
2894          *
2895          * If the above is too much to ask, don't change the keymap.
2896          * Ask the thinkpad-acpi maintainer to do it, instead.
2897          */
2898         static u16 ibm_keycode_map[] __initdata = {
2899                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2900                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
2901                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2902                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2903
2904                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2905                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2906                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2907                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2908
2909                 /* brightness: firmware always reacts to them, unless
2910                  * X.org did some tricks in the radeon BIOS scratch
2911                  * registers of *some* models */
2912                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2913                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2914
2915                 /* Thinklight: firmware always react to it */
2916                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2917
2918                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2919                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2920
2921                 /* Volume: firmware always react to it and reprograms
2922                  * the built-in *extra* mixer.  Never map it to control
2923                  * another mixer by default. */
2924                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2925                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2926                 KEY_RESERVED,   /* 0x16: MUTE */
2927
2928                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2929
2930                 /* (assignments unknown, please report if found) */
2931                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2932                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2933         };
2934         static u16 lenovo_keycode_map[] __initdata = {
2935                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2936                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2937                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2938                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2939
2940                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2941                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2942                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2943                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2944
2945                 /* These should be enabled --only-- when ACPI video
2946                  * is disabled (i.e. in "vendor" mode), and are handled
2947                  * in a special way by the init code */
2948                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
2949                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
2950
2951                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2952
2953                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2954                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2955
2956                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2957                  * react to it and reprograms the built-in *extra* mixer.
2958                  * Never map it to control another mixer by default.
2959                  *
2960                  * T60?, T61, R60?, R61: firmware and EC tries to send
2961                  * these over the regular keyboard, so these are no-ops,
2962                  * but there are still weird bugs re. MUTE, so do not
2963                  * change unless you get test reports from all Lenovo
2964                  * models.  May cause the BIOS to interfere with the
2965                  * HDA mixer.
2966                  */
2967                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2968                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2969                 KEY_RESERVED,   /* 0x16: MUTE */
2970
2971                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2972
2973                 /* (assignments unknown, please report if found) */
2974                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2975                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2976         };
2977
2978 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2979 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2980 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2981
2982         int res, i;
2983         int status;
2984         int hkeyv;
2985
2986         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2987                         "initializing hotkey subdriver\n");
2988
2989         BUG_ON(!tpacpi_inputdev);
2990         BUG_ON(tpacpi_inputdev->open != NULL ||
2991                tpacpi_inputdev->close != NULL);
2992
2993         TPACPI_ACPIHANDLE_INIT(hkey);
2994         mutex_init(&hotkey_mutex);
2995
2996 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2997         mutex_init(&hotkey_thread_mutex);
2998         mutex_init(&hotkey_thread_data_mutex);
2999 #endif
3000
3001         /* hotkey not supported on 570 */
3002         tp_features.hotkey = hkey_handle != NULL;
3003
3004         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3005                 "hotkeys are %s\n",
3006                 str_supported(tp_features.hotkey));
3007
3008         if (!tp_features.hotkey)
3009                 return 1;
3010
3011         tpacpi_disable_brightness_delay();
3012
3013         hotkey_dev_attributes = create_attr_set(13, NULL);
3014         if (!hotkey_dev_attributes)
3015                 return -ENOMEM;
3016         res = add_many_to_attr_set(hotkey_dev_attributes,
3017                         hotkey_attributes,
3018                         ARRAY_SIZE(hotkey_attributes));
3019         if (res)
3020                 goto err_exit;
3021
3022         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3023            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3024            for HKEY interface version 0x100 */
3025         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3026                 if ((hkeyv >> 8) != 1) {
3027                         printk(TPACPI_ERR "unknown version of the "
3028                                "HKEY interface: 0x%x\n", hkeyv);
3029                         printk(TPACPI_ERR "please report this to %s\n",
3030                                TPACPI_MAIL);
3031                 } else {
3032                         /*
3033                          * MHKV 0x100 in A31, R40, R40e,
3034                          * T4x, X31, and later
3035                          */
3036                         tp_features.hotkey_mask = 1;
3037                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3038                                 "firmware HKEY interface version: 0x%x\n",
3039                                 hkeyv);
3040                 }
3041         }
3042
3043         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3044                 "hotkey masks are %s\n",
3045                 str_supported(tp_features.hotkey_mask));
3046
3047         if (tp_features.hotkey_mask) {
3048                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3049                                 "MHKA", "qd")) {
3050                         printk(TPACPI_ERR
3051                                "missing MHKA handler, "
3052                                "please report this to %s\n",
3053                                TPACPI_MAIL);
3054                         /* FN+F12, FN+F4, FN+F3 */
3055                         hotkey_all_mask = 0x080cU;
3056                 }
3057         }
3058
3059         /* hotkey_source_mask *must* be zero for
3060          * the first hotkey_mask_get */
3061         if (tp_features.hotkey_mask) {
3062                 res = hotkey_mask_get();
3063                 if (res)
3064                         goto err_exit;
3065
3066                 hotkey_orig_mask = hotkey_mask;
3067                 res = add_many_to_attr_set(
3068                                 hotkey_dev_attributes,
3069                                 hotkey_mask_attributes,
3070                                 ARRAY_SIZE(hotkey_mask_attributes));
3071                 if (res)
3072                         goto err_exit;
3073         }
3074
3075 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3076         if (dbg_wlswemul) {
3077                 tp_features.hotkey_wlsw = 1;
3078                 printk(TPACPI_INFO
3079                         "radio switch emulation enabled\n");
3080         } else
3081 #endif
3082         /* Not all thinkpads have a hardware radio switch */
3083         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3084                 tp_features.hotkey_wlsw = 1;
3085                 printk(TPACPI_INFO
3086                         "radio switch found; radios are %s\n",
3087                         enabled(status, 0));
3088         }
3089         if (tp_features.hotkey_wlsw)
3090                 res = add_to_attr_set(hotkey_dev_attributes,
3091                                 &dev_attr_hotkey_radio_sw.attr);
3092
3093         /* For X41t, X60t, X61t Tablets... */
3094         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3095                 tp_features.hotkey_tablet = 1;
3096                 printk(TPACPI_INFO
3097                         "possible tablet mode switch found; "
3098                         "ThinkPad in %s mode\n",
3099                         (status & TP_HOTKEY_TABLET_MASK)?
3100                                 "tablet" : "laptop");
3101                 res = add_to_attr_set(hotkey_dev_attributes,
3102                                 &dev_attr_hotkey_tablet_mode.attr);
3103         }
3104
3105         if (!res)
3106                 res = register_attr_set_with_sysfs(
3107                                 hotkey_dev_attributes,
3108                                 &tpacpi_pdev->dev.kobj);
3109         if (res)
3110                 goto err_exit;
3111
3112         /* Set up key map */
3113
3114         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3115                                         GFP_KERNEL);
3116         if (!hotkey_keycode_map) {
3117                 printk(TPACPI_ERR
3118                         "failed to allocate memory for key map\n");
3119                 res = -ENOMEM;
3120                 goto err_exit;
3121         }
3122
3123         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3124                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3125                            "using Lenovo default hot key map\n");
3126                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3127                         TPACPI_HOTKEY_MAP_SIZE);
3128         } else {
3129                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3130                            "using IBM default hot key map\n");
3131                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3132                         TPACPI_HOTKEY_MAP_SIZE);
3133         }
3134
3135         set_bit(EV_KEY, tpacpi_inputdev->evbit);
3136         set_bit(EV_MSC, tpacpi_inputdev->evbit);
3137         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
3138         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3139         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3140         tpacpi_inputdev->keycode = hotkey_keycode_map;
3141         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3142                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3143                         set_bit(hotkey_keycode_map[i],
3144                                 tpacpi_inputdev->keybit);
3145                 } else {
3146                         if (i < sizeof(hotkey_reserved_mask)*8)
3147                                 hotkey_reserved_mask |= 1 << i;
3148                 }
3149         }
3150
3151         if (tp_features.hotkey_wlsw) {
3152                 set_bit(EV_SW, tpacpi_inputdev->evbit);
3153                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
3154         }
3155         if (tp_features.hotkey_tablet) {
3156                 set_bit(EV_SW, tpacpi_inputdev->evbit);
3157                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
3158         }
3159
3160         /* Do not issue duplicate brightness change events to
3161          * userspace */
3162         if (!tp_features.bright_acpimode)
3163                 /* update bright_acpimode... */
3164                 tpacpi_check_std_acpi_brightness_support();
3165
3166         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3167                 printk(TPACPI_INFO
3168                        "This ThinkPad has standard ACPI backlight "
3169                        "brightness control, supported by the ACPI "
3170                        "video driver\n");
3171                 printk(TPACPI_NOTICE
3172                        "Disabling thinkpad-acpi brightness events "
3173                        "by default...\n");
3174
3175                 /* Disable brightness up/down on Lenovo thinkpads when
3176                  * ACPI is handling them, otherwise it is plain impossible
3177                  * for userspace to do something even remotely sane */
3178                 hotkey_reserved_mask |=
3179                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3180                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3181                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3182                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3183         }
3184
3185 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3186         if (tp_features.hotkey_mask) {
3187                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3188                                         & ~hotkey_all_mask
3189                                         & ~hotkey_reserved_mask;
3190         } else {
3191                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3192                                         & ~hotkey_reserved_mask;
3193         }
3194
3195         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3196                     "hotkey source mask 0x%08x, polling freq %u\n",
3197                     hotkey_source_mask, hotkey_poll_freq);
3198 #endif
3199
3200         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3201                         "enabling firmware HKEY event interface...\n");
3202         res = hotkey_status_set(true);
3203         if (res) {
3204                 hotkey_exit();
3205                 return res;
3206         }
3207         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
3208                                 & ~hotkey_reserved_mask)
3209                                 | hotkey_orig_mask);
3210         if (res < 0 && res != -ENXIO) {
3211                 hotkey_exit();
3212                 return res;
3213         }
3214
3215         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3216                         "legacy ibm/hotkey event reporting over procfs %s\n",
3217                         (hotkey_report_mode < 2) ?
3218                                 "enabled" : "disabled");
3219
3220         tpacpi_inputdev->open = &hotkey_inputdev_open;
3221         tpacpi_inputdev->close = &hotkey_inputdev_close;
3222
3223         hotkey_poll_setup_safe(true);
3224         tpacpi_send_radiosw_update();
3225         tpacpi_input_send_tabletsw();
3226
3227         return 0;
3228
3229 err_exit:
3230         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3231         hotkey_dev_attributes = NULL;
3232
3233         return (res < 0)? res : 1;
3234 }
3235
3236 static bool hotkey_notify_hotkey(const u32 hkey,
3237                                  bool *send_acpi_ev,
3238                                  bool *ignore_acpi_ev)
3239 {
3240         /* 0x1000-0x1FFF: key presses */
3241         unsigned int scancode = hkey & 0xfff;
3242         *send_acpi_ev = true;
3243         *ignore_acpi_ev = false;
3244
3245         if (scancode > 0 && scancode < 0x21) {
3246                 scancode--;
3247                 if (!(hotkey_source_mask & (1 << scancode))) {
3248                         tpacpi_input_send_key(scancode);
3249                         *send_acpi_ev = false;
3250                 } else {
3251                         *ignore_acpi_ev = true;
3252                 }
3253                 return true;
3254         }
3255         return false;
3256 }
3257
3258 static bool hotkey_notify_wakeup(const u32 hkey,
3259                                  bool *send_acpi_ev,
3260                                  bool *ignore_acpi_ev)
3261 {
3262         /* 0x2000-0x2FFF: Wakeup reason */
3263         *send_acpi_ev = true;
3264         *ignore_acpi_ev = false;
3265
3266         switch (hkey) {
3267         case 0x2304: /* suspend, undock */
3268         case 0x2404: /* hibernation, undock */
3269                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3270                 *ignore_acpi_ev = true;
3271                 break;
3272
3273         case 0x2305: /* suspend, bay eject */
3274         case 0x2405: /* hibernation, bay eject */
3275                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3276                 *ignore_acpi_ev = true;
3277                 break;
3278
3279         case 0x2313: /* Battery on critical low level (S3) */
3280         case 0x2413: /* Battery on critical low level (S4) */
3281                 printk(TPACPI_ALERT
3282                         "EMERGENCY WAKEUP: battery almost empty\n");
3283                 /* how to auto-heal: */
3284                 /* 2313: woke up from S3, go to S4/S5 */
3285                 /* 2413: woke up from S4, go to S5 */
3286                 break;
3287
3288         default:
3289                 return false;
3290         }
3291
3292         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3293                 printk(TPACPI_INFO
3294                        "woke up due to a hot-unplug "
3295                        "request...\n");
3296                 hotkey_wakeup_reason_notify_change();
3297         }
3298         return true;
3299 }
3300
3301 static bool hotkey_notify_usrevent(const u32 hkey,
3302                                  bool *send_acpi_ev,
3303                                  bool *ignore_acpi_ev)
3304 {
3305         /* 0x5000-0x5FFF: human interface helpers */
3306         *send_acpi_ev = true;
3307         *ignore_acpi_ev = false;
3308
3309         switch (hkey) {
3310         case 0x5010: /* Lenovo new BIOS: brightness changed */
3311         case 0x500b: /* X61t: tablet pen inserted into bay */
3312         case 0x500c: /* X61t: tablet pen removed from bay */
3313                 return true;
3314
3315         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
3316         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
3317                 tpacpi_input_send_tabletsw();
3318                 hotkey_tablet_mode_notify_change();
3319                 *send_acpi_ev = false;
3320                 return true;
3321
3322         case 0x5001:
3323         case 0x5002:
3324                 /* LID switch events.  Do not propagate */
3325                 *ignore_acpi_ev = true;
3326                 return true;
3327
3328         default:
3329                 return false;
3330         }
3331 }
3332
3333 static bool hotkey_notify_thermal(const u32 hkey,
3334                                  bool *send_acpi_ev,
3335                                  bool *ignore_acpi_ev)
3336 {
3337         /* 0x6000-0x6FFF: thermal alarms */
3338         *send_acpi_ev = true;
3339         *ignore_acpi_ev = false;
3340
3341         switch (hkey) {
3342         case 0x6011:
3343                 printk(TPACPI_CRIT
3344                         "THERMAL ALARM: battery is too hot!\n");
3345                 /* recommended action: warn user through gui */
3346                 return true;
3347         case 0x6012:
3348                 printk(TPACPI_ALERT
3349                         "THERMAL EMERGENCY: battery is extremely hot!\n");
3350                 /* recommended action: immediate sleep/hibernate */
3351                 return true;
3352         case 0x6021:
3353                 printk(TPACPI_CRIT
3354                         "THERMAL ALARM: "
3355                         "a sensor reports something is too hot!\n");
3356                 /* recommended action: warn user through gui, that */
3357                 /* some internal component is too hot */
3358                 return true;
3359         case 0x6022:
3360                 printk(TPACPI_ALERT
3361                         "THERMAL EMERGENCY: "
3362                         "a sensor reports something is extremely hot!\n");
3363                 /* recommended action: immediate sleep/hibernate */
3364                 return true;
3365         case 0x6030:
3366                 printk(TPACPI_INFO
3367                         "EC reports that Thermal Table has changed\n");
3368                 /* recommended action: do nothing, we don't have
3369                  * Lenovo ATM information */
3370                 return true;
3371         default:
3372                 printk(TPACPI_ALERT
3373                          "THERMAL ALERT: unknown thermal alarm received\n");
3374                 return false;
3375         }
3376 }
3377
3378 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3379 {
3380         u32 hkey;
3381         bool send_acpi_ev;
3382         bool ignore_acpi_ev;
3383         bool known_ev;
3384
3385         if (event != 0x80) {
3386                 printk(TPACPI_ERR
3387                        "unknown HKEY notification event %d\n", event);
3388                 /* forward it to userspace, maybe it knows how to handle it */
3389                 acpi_bus_generate_netlink_event(
3390                                         ibm->acpi->device->pnp.device_class,
3391                                         dev_name(&ibm->acpi->device->dev),
3392                                         event, 0);
3393                 return;
3394         }
3395
3396         while (1) {
3397                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3398                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3399                         return;
3400                 }
3401
3402                 if (hkey == 0) {
3403                         /* queue empty */
3404                         return;
3405                 }
3406
3407                 send_acpi_ev = true;
3408                 ignore_acpi_ev = false;
3409
3410                 switch (hkey >> 12) {
3411                 case 1:
3412                         /* 0x1000-0x1FFF: key presses */
3413                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3414                                                  &ignore_acpi_ev);
3415                         break;
3416                 case 2:
3417                         /* 0x2000-0x2FFF: Wakeup reason */
3418                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3419                                                  &ignore_acpi_ev);
3420                         break;
3421                 case 3:
3422                         /* 0x3000-0x3FFF: bay-related wakeups */
3423                         if (hkey == 0x3003) {
3424                                 hotkey_autosleep_ack = 1;
3425                                 printk(TPACPI_INFO
3426                                        "bay ejected\n");
3427                                 hotkey_wakeup_hotunplug_complete_notify_change();
3428                                 known_ev = true;
3429                         } else {
3430                                 known_ev = false;
3431                         }
3432                         break;
3433                 case 4:
3434                         /* 0x4000-0x4FFF: dock-related wakeups */
3435                         if (hkey == 0x4003) {
3436                                 hotkey_autosleep_ack = 1;
3437                                 printk(TPACPI_INFO
3438                                        "undocked\n");
3439                                 hotkey_wakeup_hotunplug_complete_notify_change();
3440                                 known_ev = true;
3441                         } else {
3442                                 known_ev = false;
3443                         }
3444                         break;
3445                 case 5:
3446                         /* 0x5000-0x5FFF: human interface helpers */
3447                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3448                                                  &ignore_acpi_ev);
3449                         break;
3450                 case 6:
3451                         /* 0x6000-0x6FFF: thermal alarms */
3452                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3453                                                  &ignore_acpi_ev);
3454                         break;
3455                 case 7:
3456                         /* 0x7000-0x7FFF: misc */
3457                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
3458                                 tpacpi_send_radiosw_update();
3459                                 send_acpi_ev = 0;
3460                                 known_ev = true;
3461                                 break;
3462                         }
3463                         /* fallthrough to default */
3464                 default:
3465                         known_ev = false;
3466                 }
3467                 if (!known_ev) {
3468                         printk(TPACPI_NOTICE
3469                                "unhandled HKEY event 0x%04x\n", hkey);
3470                         printk(TPACPI_NOTICE
3471                                "please report the conditions when this "
3472                                "event happened to %s\n", TPACPI_MAIL);
3473                 }
3474
3475                 /* Legacy events */
3476                 if (!ignore_acpi_ev &&
3477                     (send_acpi_ev || hotkey_report_mode < 2)) {
3478                         acpi_bus_generate_proc_event(ibm->acpi->device,
3479                                                      event, hkey);
3480                 }
3481
3482                 /* netlink events */
3483                 if (!ignore_acpi_ev && send_acpi_ev) {
3484                         acpi_bus_generate_netlink_event(
3485                                         ibm->acpi->device->pnp.device_class,
3486                                         dev_name(&ibm->acpi->device->dev),
3487                                         event, hkey);
3488                 }
3489         }
3490 }
3491
3492 static void hotkey_suspend(pm_message_t state)
3493 {
3494         /* Do these on suspend, we get the events on early resume! */
3495         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3496         hotkey_autosleep_ack = 0;
3497 }
3498
3499 static void hotkey_resume(void)
3500 {
3501         tpacpi_disable_brightness_delay();
3502
3503         if (hotkey_mask_get())
3504                 printk(TPACPI_ERR
3505                        "error while trying to read hot key mask "
3506                        "from firmware\n");
3507         tpacpi_send_radiosw_update();
3508         hotkey_tablet_mode_notify_change();
3509         hotkey_wakeup_reason_notify_change();
3510         hotkey_wakeup_hotunplug_complete_notify_change();
3511         hotkey_poll_setup_safe(false);
3512 }
3513
3514 /* procfs -------------------------------------------------------------- */
3515 static int hotkey_read(char *p)
3516 {
3517         int res, status;
3518         int len = 0;
3519
3520         if (!tp_features.hotkey) {
3521                 len += sprintf(p + len, "status:\t\tnot supported\n");
3522                 return len;
3523         }
3524
3525         if (mutex_lock_killable(&hotkey_mutex))
3526                 return -ERESTARTSYS;
3527         res = hotkey_status_get(&status);
3528         if (!res)
3529                 res = hotkey_mask_get();
3530         mutex_unlock(&hotkey_mutex);
3531         if (res)
3532                 return res;
3533
3534         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3535         if (tp_features.hotkey_mask) {
3536                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
3537                 len += sprintf(p + len,
3538                                "commands:\tenable, disable, reset, <mask>\n");
3539         } else {
3540                 len += sprintf(p + len, "mask:\t\tnot supported\n");
3541                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3542         }
3543
3544         return len;
3545 }
3546
3547 static void hotkey_enabledisable_warn(bool enable)
3548 {
3549         tpacpi_log_usertask("procfs hotkey enable/disable");
3550         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3551                         TPACPI_WARN
3552                         "hotkey enable/disable functionality has been "
3553                         "removed from the driver.  Hotkeys are always "
3554                         "enabled\n"))
3555                 printk(TPACPI_ERR
3556                         "Please remove the hotkey=enable module "
3557                         "parameter, it is deprecated.  Hotkeys are always "
3558                         "enabled\n");
3559 }
3560
3561 static int hotkey_write(char *buf)
3562 {
3563         int res;
3564         u32 mask;
3565         char *cmd;
3566
3567         if (!tp_features.hotkey)
3568                 return -ENODEV;
3569
3570         if (mutex_lock_killable(&hotkey_mutex))
3571                 return -ERESTARTSYS;
3572
3573         mask = hotkey_mask;
3574
3575         res = 0;
3576         while ((cmd = next_cmd(&buf))) {
3577                 if (strlencmp(cmd, "enable") == 0) {
3578                         hotkey_enabledisable_warn(1);
3579                 } else if (strlencmp(cmd, "disable") == 0) {
3580                         hotkey_enabledisable_warn(0);
3581                         res = -EPERM;
3582                 } else if (strlencmp(cmd, "reset") == 0) {
3583                         mask = (hotkey_all_mask | hotkey_source_mask)
3584                                 & ~hotkey_reserved_mask;
3585                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3586                         /* mask set */
3587                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3588                         /* mask set */
3589                 } else {
3590                         res = -EINVAL;
3591                         goto errexit;
3592                 }
3593         }
3594
3595         if (!res)
3596                 tpacpi_disclose_usertask("procfs hotkey",
3597                         "set mask to 0x%08x\n", mask);
3598
3599         if (!res && mask != hotkey_mask)
3600                 res = hotkey_mask_set(mask);
3601
3602 errexit:
3603         mutex_unlock(&hotkey_mutex);
3604         return res;
3605 }
3606
3607 static const struct acpi_device_id ibm_htk_device_ids[] = {
3608         {TPACPI_ACPI_HKEY_HID, 0},
3609         {"", 0},
3610 };
3611
3612 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3613         .hid = ibm_htk_device_ids,
3614         .notify = hotkey_notify,
3615         .handle = &hkey_handle,
3616         .type = ACPI_DEVICE_NOTIFY,
3617 };
3618
3619 static struct ibm_struct hotkey_driver_data = {
3620         .name = "hotkey",
3621         .read = hotkey_read,
3622         .write = hotkey_write,
3623         .exit = hotkey_exit,
3624         .resume = hotkey_resume,
3625         .suspend = hotkey_suspend,
3626         .acpi = &ibm_hotkey_acpidriver,
3627 };
3628
3629 /*************************************************************************
3630  * Bluetooth subdriver
3631  */
3632
3633 enum {
3634         /* ACPI GBDC/SBDC bits */
3635         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3636         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3637         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3638                                                    off / last state */
3639 };
3640
3641 enum {
3642         /* ACPI \BLTH commands */
3643         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3644         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3645         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3646         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3647         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3648 };
3649
3650 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3651
3652 static void bluetooth_suspend(pm_message_t state)
3653 {
3654         /* Try to make sure radio will resume powered off */
3655         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3656                    TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3657                 vdbg_printk(TPACPI_DBG_RFKILL,
3658                         "bluetooth power down on resume request failed\n");
3659 }
3660
3661 static int bluetooth_get_status(void)
3662 {
3663         int status;
3664
3665 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3666         if (dbg_bluetoothemul)
3667                 return (tpacpi_bluetooth_emulstate) ?
3668                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3669 #endif
3670
3671         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3672                 return -EIO;
3673
3674         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3675                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3676 }
3677
3678 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3679 {
3680         int status;
3681
3682         vdbg_printk(TPACPI_DBG_RFKILL,
3683                 "will attempt to %s bluetooth\n",
3684                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3685
3686 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3687         if (dbg_bluetoothemul) {
3688                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3689                 return 0;
3690         }
3691 #endif
3692
3693         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3694         if (state == TPACPI_RFK_RADIO_ON)
3695                 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3696         else
3697                 status = 0;
3698
3699         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3700                 return -EIO;
3701
3702         return 0;
3703 }
3704
3705 /* sysfs bluetooth enable ---------------------------------------------- */
3706 static ssize_t bluetooth_enable_show(struct device *dev,
3707                            struct device_attribute *attr,
3708                            char *buf)
3709 {
3710         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3711                         attr, buf);
3712 }
3713
3714 static ssize_t bluetooth_enable_store(struct device *dev,
3715                             struct device_attribute *attr,
3716                             const char *buf, size_t count)
3717 {
3718         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3719                                 attr, buf, count);
3720 }
3721
3722 static struct device_attribute dev_attr_bluetooth_enable =
3723         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3724                 bluetooth_enable_show, bluetooth_enable_store);
3725
3726 /* --------------------------------------------------------------------- */
3727
3728 static struct attribute *bluetooth_attributes[] = {
3729         &dev_attr_bluetooth_enable.attr,
3730         NULL
3731 };
3732
3733 static const struct attribute_group bluetooth_attr_group = {
3734         .attrs = bluetooth_attributes,
3735 };
3736
3737 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3738         .get_status = bluetooth_get_status,
3739         .set_status = bluetooth_set_status,
3740 };
3741
3742 static void bluetooth_shutdown(void)
3743 {
3744         /* Order firmware to save current state to NVRAM */
3745         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3746                         TP_ACPI_BLTH_SAVE_STATE))
3747                 printk(TPACPI_NOTICE
3748                         "failed to save bluetooth state to NVRAM\n");
3749         else
3750                 vdbg_printk(TPACPI_DBG_RFKILL,
3751                         "bluestooth state saved to NVRAM\n");
3752 }
3753
3754 static void bluetooth_exit(void)
3755 {
3756         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3757                         &bluetooth_attr_group);
3758
3759         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3760
3761         bluetooth_shutdown();
3762 }
3763
3764 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3765 {
3766         int res;
3767         int status = 0;
3768
3769         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3770                         "initializing bluetooth subdriver\n");
3771
3772         TPACPI_ACPIHANDLE_INIT(hkey);
3773
3774         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3775            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3776         tp_features.bluetooth = hkey_handle &&
3777             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3778
3779         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3780                 "bluetooth is %s, status 0x%02x\n",
3781                 str_supported(tp_features.bluetooth),
3782                 status);
3783
3784 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3785         if (dbg_bluetoothemul) {
3786                 tp_features.bluetooth = 1;
3787                 printk(TPACPI_INFO
3788                         "bluetooth switch emulation enabled\n");
3789         } else
3790 #endif
3791         if (tp_features.bluetooth &&
3792             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3793                 /* no bluetooth hardware present in system */
3794                 tp_features.bluetooth = 0;
3795                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3796                            "bluetooth hardware not installed\n");
3797         }
3798
3799         if (!tp_features.bluetooth)
3800                 return 1;
3801
3802         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3803                                 &bluetooth_tprfk_ops,
3804                                 RFKILL_TYPE_BLUETOOTH,
3805                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
3806                                 true);
3807         if (res)
3808                 return res;
3809
3810         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3811                                 &bluetooth_attr_group);
3812         if (res) {
3813                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3814                 return res;
3815         }
3816
3817         return 0;
3818 }
3819
3820 /* procfs -------------------------------------------------------------- */
3821 static int bluetooth_read(char *p)
3822 {
3823         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
3824 }
3825
3826 static int bluetooth_write(char *buf)
3827 {
3828         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
3829 }
3830
3831 static struct ibm_struct bluetooth_driver_data = {
3832         .name = "bluetooth",
3833         .read = bluetooth_read,
3834         .write = bluetooth_write,
3835         .exit = bluetooth_exit,
3836         .suspend = bluetooth_suspend,
3837         .shutdown = bluetooth_shutdown,
3838 };
3839
3840 /*************************************************************************
3841  * Wan subdriver
3842  */
3843
3844 enum {
3845         /* ACPI GWAN/SWAN bits */
3846         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
3847         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
3848         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
3849                                                    off / last state */
3850 };
3851
3852 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
3853
3854 static void wan_suspend(pm_message_t state)
3855 {
3856         /* Try to make sure radio will resume powered off */
3857         if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3858                    TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3859                 vdbg_printk(TPACPI_DBG_RFKILL,
3860                         "WWAN power down on resume request failed\n");
3861 }
3862
3863 static int wan_get_status(void)
3864 {
3865         int status;
3866
3867 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3868         if (dbg_wwanemul)
3869                 return (tpacpi_wwan_emulstate) ?
3870                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3871 #endif
3872
3873         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3874                 return -EIO;
3875
3876         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3877                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3878 }
3879
3880 static int wan_set_status(enum tpacpi_rfkill_state state)
3881 {
3882         int status;
3883
3884         vdbg_printk(TPACPI_DBG_RFKILL,
3885                 "will attempt to %s wwan\n",
3886                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3887
3888 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3889         if (dbg_wwanemul) {
3890                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
3891                 return 0;
3892         }
3893 #endif
3894
3895         /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3896         if (state == TPACPI_RFK_RADIO_ON)
3897                 status = TP_ACPI_WANCARD_RADIOSSW;
3898         else
3899                 status = 0;
3900
3901         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3902                 return -EIO;
3903
3904         return 0;
3905 }
3906
3907 /* sysfs wan enable ---------------------------------------------------- */
3908 static ssize_t wan_enable_show(struct device *dev,
3909                            struct device_attribute *attr,
3910                            char *buf)
3911 {
3912         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
3913                         attr, buf);
3914 }
3915
3916 static ssize_t wan_enable_store(struct device *dev,
3917                             struct device_attribute *attr,
3918                             const char *buf, size_t count)
3919 {
3920         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
3921                         attr, buf, count);
3922 }
3923
3924 static struct device_attribute dev_attr_wan_enable =
3925         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3926                 wan_enable_show, wan_enable_store);
3927
3928 /* --------------------------------------------------------------------- */
3929
3930 static struct attribute *wan_attributes[] = {
3931         &dev_attr_wan_enable.attr,
3932         NULL
3933 };
3934
3935 static const struct attribute_group wan_attr_group = {
3936         .attrs = wan_attributes,
3937 };
3938
3939 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
3940         .get_status = wan_get_status,
3941         .set_status = wan_set_status,
3942 };
3943
3944 static void wan_shutdown(void)
3945 {
3946         /* Order firmware to save current state to NVRAM */
3947         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3948                         TP_ACPI_WGSV_SAVE_STATE))
3949                 printk(TPACPI_NOTICE
3950                         "failed to save WWAN state to NVRAM\n");
3951         else
3952                 vdbg_printk(TPACPI_DBG_RFKILL,
3953                         "WWAN state saved to NVRAM\n");
3954 }
3955
3956 static void wan_exit(void)
3957 {
3958         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3959                 &wan_attr_group);
3960
3961         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
3962
3963         wan_shutdown();
3964 }
3965
3966 static int __init wan_init(struct ibm_init_struct *iibm)
3967 {
3968         int res;
3969         int status = 0;
3970
3971         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3972                         "initializing wan subdriver\n");
3973
3974         TPACPI_ACPIHANDLE_INIT(hkey);
3975
3976         tp_features.wan = hkey_handle &&
3977             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3978
3979         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3980                 "wan is %s, status 0x%02x\n",
3981                 str_supported(tp_features.wan),
3982                 status);
3983
3984 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3985         if (dbg_wwanemul) {
3986                 tp_features.wan = 1;
3987                 printk(TPACPI_INFO
3988                         "wwan switch emulation enabled\n");
3989         } else
3990 #endif
3991         if (tp_features.wan &&
3992             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3993                 /* no wan hardware present in system */
3994                 tp_features.wan = 0;
3995                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3996                            "wan hardware not installed\n");
3997         }
3998
3999         if (!tp_features.wan)
4000                 return 1;
4001
4002         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4003                                 &wan_tprfk_ops,
4004                                 RFKILL_TYPE_WWAN,
4005                                 TPACPI_RFK_WWAN_SW_NAME,
4006                                 true);
4007         if (res)
4008                 return res;
4009
4010         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4011                                 &wan_attr_group);
4012
4013         if (res) {
4014                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4015                 return res;
4016         }
4017
4018         return 0;
4019 }
4020
4021 /* procfs -------------------------------------------------------------- */
4022 static int wan_read(char *p)
4023 {
4024         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
4025 }
4026
4027 static int wan_write(char *buf)
4028 {
4029         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4030 }
4031
4032 static struct ibm_struct wan_driver_data = {
4033         .name = "wan",
4034         .read = wan_read,
4035         .write = wan_write,
4036         .exit = wan_exit,
4037         .suspend = wan_suspend,
4038         .shutdown = wan_shutdown,
4039 };
4040
4041 /*************************************************************************
4042  * UWB subdriver
4043  */
4044
4045 enum {
4046         /* ACPI GUWB/SUWB bits */
4047         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4048         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4049 };
4050
4051 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4052
4053 static int uwb_get_status(void)
4054 {
4055         int status;
4056
4057 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4058         if (dbg_uwbemul)
4059                 return (tpacpi_uwb_emulstate) ?
4060                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4061 #endif
4062
4063         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4064                 return -EIO;
4065
4066         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4067                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4068 }
4069
4070 static int uwb_set_status(enum tpacpi_rfkill_state state)
4071 {
4072         int status;
4073
4074         vdbg_printk(TPACPI_DBG_RFKILL,
4075                 "will attempt to %s UWB\n",
4076                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4077
4078 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4079         if (dbg_uwbemul) {
4080                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4081                 return 0;
4082         }
4083 #endif
4084
4085         if (state == TPACPI_RFK_RADIO_ON)
4086                 status = TP_ACPI_UWB_RADIOSSW;
4087         else
4088                 status = 0;
4089
4090         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4091                 return -EIO;
4092
4093         return 0;
4094 }
4095
4096 /* --------------------------------------------------------------------- */
4097
4098 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4099         .get_status = uwb_get_status,
4100         .set_status = uwb_set_status,
4101 };
4102
4103 static void uwb_exit(void)
4104 {
4105         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4106 }
4107
4108 static int __init uwb_init(struct ibm_init_struct *iibm)
4109 {
4110         int res;
4111         int status = 0;
4112
4113         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4114                         "initializing uwb subdriver\n");
4115
4116         TPACPI_ACPIHANDLE_INIT(hkey);
4117
4118         tp_features.uwb = hkey_handle &&
4119             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4120
4121         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4122                 "uwb is %s, status 0x%02x\n",
4123                 str_supported(tp_features.uwb),
4124                 status);
4125
4126 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4127         if (dbg_uwbemul) {
4128                 tp_features.uwb = 1;
4129                 printk(TPACPI_INFO
4130                         "uwb switch emulation enabled\n");
4131         } else
4132 #endif
4133         if (tp_features.uwb &&
4134             !(status & TP_ACPI_UWB_HWPRESENT)) {
4135                 /* no uwb hardware present in system */
4136                 tp_features.uwb = 0;
4137                 dbg_printk(TPACPI_DBG_INIT,
4138                            "uwb hardware not installed\n");
4139         }
4140
4141         if (!tp_features.uwb)
4142                 return 1;
4143
4144         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4145                                 &uwb_tprfk_ops,
4146                                 RFKILL_TYPE_UWB,
4147                                 TPACPI_RFK_UWB_SW_NAME,
4148                                 false);
4149         return res;
4150 }
4151
4152 static struct ibm_struct uwb_driver_data = {
4153         .name = "uwb",
4154         .exit = uwb_exit,
4155         .flags.experimental = 1,
4156 };
4157
4158 /*************************************************************************
4159  * Video subdriver
4160  */
4161
4162 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4163
4164 enum video_access_mode {
4165         TPACPI_VIDEO_NONE = 0,
4166         TPACPI_VIDEO_570,       /* 570 */
4167         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4168         TPACPI_VIDEO_NEW,       /* all others */
4169 };
4170
4171 enum {  /* video status flags, based on VIDEO_570 */
4172         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4173         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4174         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4175 };
4176
4177 enum {  /* TPACPI_VIDEO_570 constants */
4178         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4179         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4180                                                  * video_status_flags */
4181         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4182         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4183 };
4184
4185 static enum video_access_mode video_supported;
4186 static int video_orig_autosw;
4187
4188 static int video_autosw_get(void);
4189 static int video_autosw_set(int enable);
4190
4191 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4192
4193 static int __init video_init(struct ibm_init_struct *iibm)
4194 {
4195         int ivga;
4196
4197         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4198
4199         TPACPI_ACPIHANDLE_INIT(vid);
4200         TPACPI_ACPIHANDLE_INIT(vid2);
4201
4202         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4203                 /* G41, assume IVGA doesn't change */
4204                 vid_handle = vid2_handle;
4205
4206         if (!vid_handle)
4207                 /* video switching not supported on R30, R31 */
4208                 video_supported = TPACPI_VIDEO_NONE;
4209         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4210                 /* 570 */
4211                 video_supported = TPACPI_VIDEO_570;
4212         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4213                 /* 600e/x, 770e, 770x */
4214                 video_supported = TPACPI_VIDEO_770;
4215         else
4216                 /* all others */
4217                 video_supported = TPACPI_VIDEO_NEW;
4218
4219         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4220                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4221                 video_supported);
4222
4223         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4224 }
4225
4226 static void video_exit(void)
4227 {
4228         dbg_printk(TPACPI_DBG_EXIT,
4229                    "restoring original video autoswitch mode\n");
4230         if (video_autosw_set(video_orig_autosw))
4231                 printk(TPACPI_ERR "error while trying to restore original "
4232                         "video autoswitch mode\n");
4233 }
4234
4235 static int video_outputsw_get(void)
4236 {
4237         int status = 0;
4238         int i;
4239
4240         switch (video_supported) {
4241         case TPACPI_VIDEO_570:
4242                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4243                                  TP_ACPI_VIDEO_570_PHSCMD))
4244                         return -EIO;
4245                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4246                 break;
4247         case TPACPI_VIDEO_770:
4248                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4249                         return -EIO;
4250                 if (i)
4251                         status |= TP_ACPI_VIDEO_S_LCD;
4252                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4253                         return -EIO;
4254                 if (i)
4255                         status |= TP_ACPI_VIDEO_S_CRT;
4256                 break;
4257         case TPACPI_VIDEO_NEW:
4258                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4259                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4260                         return -EIO;
4261                 if (i)
4262                         status |= TP_ACPI_VIDEO_S_CRT;
4263
4264                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4265                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4266                         return -EIO;
4267                 if (i)
4268                         status |= TP_ACPI_VIDEO_S_LCD;
4269                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4270                         return -EIO;
4271                 if (i)
4272                         status |= TP_ACPI_VIDEO_S_DVI;
4273                 break;
4274         default:
4275                 return -ENOSYS;
4276         }
4277
4278         return status;
4279 }
4280
4281 static int video_outputsw_set(int status)
4282 {
4283         int autosw;
4284         int res = 0;
4285
4286         switch (video_supported) {
4287         case TPACPI_VIDEO_570:
4288                 res = acpi_evalf(NULL, NULL,
4289                                  "\\_SB.PHS2", "vdd",
4290                                  TP_ACPI_VIDEO_570_PHS2CMD,
4291                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4292                 break;
4293         case TPACPI_VIDEO_770:
4294                 autosw = video_autosw_get();
4295                 if (autosw < 0)
4296                         return autosw;
4297
4298                 res = video_autosw_set(1);
4299                 if (res)
4300                         return res;
4301                 res = acpi_evalf(vid_handle, NULL,
4302                                  "ASWT", "vdd", status * 0x100, 0);
4303                 if (!autosw && video_autosw_set(autosw)) {
4304                         printk(TPACPI_ERR
4305                                "video auto-switch left enabled due to error\n");
4306                         return -EIO;
4307                 }
4308                 break;
4309         case TPACPI_VIDEO_NEW:
4310                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4311                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4312                 break;
4313         default:
4314                 return -ENOSYS;
4315         }
4316
4317         return (res)? 0 : -EIO;
4318 }
4319
4320 static int video_autosw_get(void)
4321 {
4322         int autosw = 0;
4323
4324         switch (video_supported) {
4325         case TPACPI_VIDEO_570:
4326                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4327                         return -EIO;
4328                 break;
4329         case TPACPI_VIDEO_770:
4330         case TPACPI_VIDEO_NEW:
4331                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4332                         return -EIO;
4333                 break;
4334         default:
4335                 return -ENOSYS;
4336         }
4337
4338         return autosw & 1;
4339 }
4340
4341 static int video_autosw_set(int enable)
4342 {
4343         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4344                 return -EIO;
4345         return 0;
4346 }
4347
4348 static int video_outputsw_cycle(void)
4349 {
4350         int autosw = video_autosw_get();
4351         int res;
4352
4353         if (autosw < 0)
4354                 return autosw;
4355
4356         switch (video_supported) {
4357         case TPACPI_VIDEO_570:
4358                 res = video_autosw_set(1);
4359                 if (res)
4360                         return res;
4361                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4362                 break;
4363         case TPACPI_VIDEO_770:
4364         case TPACPI_VIDEO_NEW:
4365                 res = video_autosw_set(1);
4366                 if (res)
4367                         return res;
4368                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4369                 break;
4370         default:
4371                 return -ENOSYS;
4372         }
4373         if (!autosw && video_autosw_set(autosw)) {
4374                 printk(TPACPI_ERR
4375                        "video auto-switch left enabled due to error\n");
4376                 return -EIO;
4377         }
4378
4379         return (res)? 0 : -EIO;
4380 }
4381
4382 static int video_expand_toggle(void)
4383 {
4384         switch (video_supported) {
4385         case TPACPI_VIDEO_570:
4386                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4387                         0 : -EIO;
4388         case TPACPI_VIDEO_770:
4389                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4390                         0 : -EIO;
4391         case TPACPI_VIDEO_NEW:
4392                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4393                         0 : -EIO;
4394         default:
4395                 return -ENOSYS;
4396         }
4397         /* not reached */
4398 }
4399
4400 static int video_read(char *p)
4401 {
4402         int status, autosw;
4403         int len = 0;
4404
4405         if (video_supported == TPACPI_VIDEO_NONE) {
4406                 len += sprintf(p + len, "status:\t\tnot supported\n");
4407                 return len;
4408         }
4409
4410         status = video_outputsw_get();
4411         if (status < 0)
4412                 return status;
4413
4414         autosw = video_autosw_get();
4415         if (autosw < 0)
4416                 return autosw;
4417
4418         len += sprintf(p + len, "status:\t\tsupported\n");
4419         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4420         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4421         if (video_supported == TPACPI_VIDEO_NEW)
4422                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4423         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4424         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4425         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4426         if (video_supported == TPACPI_VIDEO_NEW)
4427                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4428         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4429         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4430
4431         return len;
4432 }
4433
4434 static int video_write(char *buf)
4435 {
4436         char *cmd;
4437         int enable, disable, status;
4438         int res;
4439
4440         if (video_supported == TPACPI_VIDEO_NONE)
4441                 return -ENODEV;
4442
4443         enable = 0;
4444         disable = 0;
4445
4446         while ((cmd = next_cmd(&buf))) {
4447                 if (strlencmp(cmd, "lcd_enable") == 0) {
4448                         enable |= TP_ACPI_VIDEO_S_LCD;
4449                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4450                         disable |= TP_ACPI_VIDEO_S_LCD;
4451                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4452                         enable |= TP_ACPI_VIDEO_S_CRT;
4453                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4454                         disable |= TP_ACPI_VIDEO_S_CRT;
4455                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4456                            strlencmp(cmd, "dvi_enable") == 0) {
4457                         enable |= TP_ACPI_VIDEO_S_DVI;
4458                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4459                            strlencmp(cmd, "dvi_disable") == 0) {
4460                         disable |= TP_ACPI_VIDEO_S_DVI;
4461                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4462                         res = video_autosw_set(1);
4463                         if (res)
4464                                 return res;
4465                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4466                         res = video_autosw_set(0);
4467                         if (res)
4468                                 return res;
4469                 } else if (strlencmp(cmd, "video_switch") == 0) {
4470                         res = video_outputsw_cycle();
4471                         if (res)
4472                                 return res;
4473                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4474                         res = video_expand_toggle();
4475                         if (res)
4476                                 return res;
4477                 } else
4478                         return -EINVAL;
4479         }
4480
4481         if (enable || disable) {
4482                 status = video_outputsw_get();
4483                 if (status < 0)
4484                         return status;
4485                 res = video_outputsw_set((status & ~disable) | enable);
4486                 if (res)
4487                         return res;
4488         }
4489
4490         return 0;
4491 }
4492
4493 static struct ibm_struct video_driver_data = {
4494         .name = "video",
4495         .read = video_read,
4496         .write = video_write,
4497         .exit = video_exit,
4498 };
4499
4500 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4501
4502 /*************************************************************************
4503  * Light (thinklight) subdriver
4504  */
4505
4506 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4507 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4508
4509 static int light_get_status(void)
4510 {
4511         int status = 0;
4512
4513         if (tp_features.light_status) {
4514                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4515                         return -EIO;
4516                 return (!!status);
4517         }
4518
4519         return -ENXIO;
4520 }
4521
4522 static int light_set_status(int status)
4523 {
4524         int rc;
4525
4526         if (tp_features.light) {
4527                 if (cmos_handle) {
4528                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4529                                         (status)?
4530                                                 TP_CMOS_THINKLIGHT_ON :
4531                                                 TP_CMOS_THINKLIGHT_OFF);
4532                 } else {
4533                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4534                                         (status)? 1 : 0);
4535                 }
4536                 return (rc)? 0 : -EIO;
4537         }
4538
4539         return -ENXIO;
4540 }
4541
4542 static void light_set_status_worker(struct work_struct *work)
4543 {
4544         struct tpacpi_led_classdev *data =
4545                         container_of(work, struct tpacpi_led_classdev, work);
4546
4547         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4548                 light_set_status((data->new_state != TPACPI_LED_OFF));
4549 }
4550
4551 static void light_sysfs_set(struct led_classdev *led_cdev,
4552                         enum led_brightness brightness)
4553 {
4554         struct tpacpi_led_classdev *data =
4555                 container_of(led_cdev,
4556                              struct tpacpi_led_classdev,
4557                              led_classdev);
4558         data->new_state = (brightness != LED_OFF) ?
4559                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4560         queue_work(tpacpi_wq, &data->work);
4561 }
4562
4563 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4564 {
4565         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4566 }
4567
4568 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4569         .led_classdev = {
4570                 .name           = "tpacpi::thinklight",
4571                 .brightness_set = &light_sysfs_set,
4572                 .brightness_get = &light_sysfs_get,
4573         }
4574 };
4575
4576 static int __init light_init(struct ibm_init_struct *iibm)
4577 {
4578         int rc;
4579
4580         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4581
4582         TPACPI_ACPIHANDLE_INIT(ledb);
4583         TPACPI_ACPIHANDLE_INIT(lght);
4584         TPACPI_ACPIHANDLE_INIT(cmos);
4585         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4586
4587         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4588         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4589
4590         if (tp_features.light)
4591                 /* light status not supported on
4592                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4593                 tp_features.light_status =
4594                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4595
4596         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4597                 str_supported(tp_features.light),
4598                 str_supported(tp_features.light_status));
4599
4600         if (!tp_features.light)
4601                 return 1;
4602
4603         rc = led_classdev_register(&tpacpi_pdev->dev,
4604                                    &tpacpi_led_thinklight.led_classdev);
4605
4606         if (rc < 0) {
4607                 tp_features.light = 0;
4608                 tp_features.light_status = 0;
4609         } else  {
4610                 rc = 0;
4611         }
4612
4613         return rc;
4614 }
4615
4616 static void light_exit(void)
4617 {
4618         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4619         if (work_pending(&tpacpi_led_thinklight.work))
4620                 flush_workqueue(tpacpi_wq);
4621 }
4622
4623 static int light_read(char *p)
4624 {
4625         int len = 0;
4626         int status;
4627
4628         if (!tp_features.light) {
4629                 len += sprintf(p + len, "status:\t\tnot supported\n");
4630         } else if (!tp_features.light_status) {
4631                 len += sprintf(p + len, "status:\t\tunknown\n");
4632                 len += sprintf(p + len, "commands:\ton, off\n");
4633         } else {
4634                 status = light_get_status();
4635                 if (status < 0)
4636                         return status;
4637                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4638                 len += sprintf(p + len, "commands:\ton, off\n");
4639         }
4640
4641         return len;
4642 }
4643
4644 static int light_write(char *buf)
4645 {
4646         char *cmd;
4647         int newstatus = 0;
4648
4649         if (!tp_features.light)
4650                 return -ENODEV;
4651
4652         while ((cmd = next_cmd(&buf))) {
4653                 if (strlencmp(cmd, "on") == 0) {
4654                         newstatus = 1;
4655                 } else if (strlencmp(cmd, "off") == 0) {
4656                         newstatus = 0;
4657                 } else
4658                         return -EINVAL;
4659         }
4660
4661         return light_set_status(newstatus);
4662 }
4663
4664 static struct ibm_struct light_driver_data = {
4665         .name = "light",
4666         .read = light_read,
4667         .write = light_write,
4668         .exit = light_exit,
4669 };
4670
4671 /*************************************************************************
4672  * CMOS subdriver
4673  */
4674
4675 /* sysfs cmos_command -------------------------------------------------- */
4676 static ssize_t cmos_command_store(struct device *dev,
4677                             struct device_attribute *attr,
4678                             const char *buf, size_t count)
4679 {
4680         unsigned long cmos_cmd;
4681         int res;
4682
4683         if (parse_strtoul(buf, 21, &cmos_cmd))
4684                 return -EINVAL;
4685
4686         res = issue_thinkpad_cmos_command(cmos_cmd);
4687         return (res)? res : count;
4688 }
4689
4690 static struct device_attribute dev_attr_cmos_command =
4691         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4692
4693 /* --------------------------------------------------------------------- */
4694
4695 static int __init cmos_init(struct ibm_init_struct *iibm)
4696 {
4697         int res;
4698
4699         vdbg_printk(TPACPI_DBG_INIT,
4700                 "initializing cmos commands subdriver\n");
4701
4702         TPACPI_ACPIHANDLE_INIT(cmos);
4703
4704         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4705                 str_supported(cmos_handle != NULL));
4706
4707         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4708         if (res)
4709                 return res;
4710
4711         return (cmos_handle)? 0 : 1;
4712 }
4713
4714 static void cmos_exit(void)
4715 {
4716         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4717 }
4718
4719 static int cmos_read(char *p)
4720 {
4721         int len = 0;
4722
4723         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4724            R30, R31, T20-22, X20-21 */
4725         if (!cmos_handle)
4726                 len += sprintf(p + len, "status:\t\tnot supported\n");
4727         else {
4728                 len += sprintf(p + len, "status:\t\tsupported\n");
4729                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4730         }
4731
4732         return len;
4733 }
4734
4735 static int cmos_write(char *buf)
4736 {
4737         char *cmd;
4738         int cmos_cmd, res;
4739
4740         while ((cmd = next_cmd(&buf))) {
4741                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4742                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4743                         /* cmos_cmd set */
4744                 } else
4745                         return -EINVAL;
4746
4747                 res = issue_thinkpad_cmos_command(cmos_cmd);
4748                 if (res)
4749                         return res;
4750         }
4751
4752         return 0;
4753 }
4754
4755 static struct ibm_struct cmos_driver_data = {
4756         .name = "cmos",
4757         .read = cmos_read,
4758         .write = cmos_write,
4759         .exit = cmos_exit,
4760 };
4761
4762 /*************************************************************************
4763  * LED subdriver
4764  */
4765
4766 enum led_access_mode {
4767         TPACPI_LED_NONE = 0,
4768         TPACPI_LED_570, /* 570 */
4769         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4770         TPACPI_LED_NEW, /* all others */
4771 };
4772
4773 enum {  /* For TPACPI_LED_OLD */
4774         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4775         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4776         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4777 };
4778
4779 static enum led_access_mode led_supported;
4780
4781 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4782            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4783                                 /* T20-22, X20-21 */
4784            "LED",               /* all others */
4785            );                   /* R30, R31 */
4786
4787 #define TPACPI_LED_NUMLEDS 16
4788 static struct tpacpi_led_classdev *tpacpi_leds;
4789 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4790 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4791         /* there's a limit of 19 chars + NULL before 2.6.26 */
4792         "tpacpi::power",
4793         "tpacpi:orange:batt",
4794         "tpacpi:green:batt",
4795         "tpacpi::dock_active",
4796         "tpacpi::bay_active",
4797         "tpacpi::dock_batt",
4798         "tpacpi::unknown_led",
4799         "tpacpi::standby",
4800         "tpacpi::dock_status1",
4801         "tpacpi::dock_status2",
4802         "tpacpi::unknown_led2",
4803         "tpacpi::unknown_led3",
4804         "tpacpi::thinkvantage",
4805 };
4806 #define TPACPI_SAFE_LEDS        0x1081U
4807
4808 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4809 {
4810 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4811         return false;
4812 #else
4813         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
4814 #endif
4815 }
4816
4817 static int led_get_status(const unsigned int led)
4818 {
4819         int status;
4820         enum led_status_t led_s;
4821
4822         switch (led_supported) {
4823         case TPACPI_LED_570:
4824                 if (!acpi_evalf(ec_handle,
4825                                 &status, "GLED", "dd", 1 << led))
4826                         return -EIO;
4827                 led_s = (status == 0)?
4828                                 TPACPI_LED_OFF :
4829                                 ((status == 1)?
4830                                         TPACPI_LED_ON :
4831                                         TPACPI_LED_BLINK);
4832                 tpacpi_led_state_cache[led] = led_s;
4833                 return led_s;
4834         default:
4835                 return -ENXIO;
4836         }
4837
4838         /* not reached */
4839 }
4840
4841 static int led_set_status(const unsigned int led,
4842                           const enum led_status_t ledstatus)
4843 {
4844         /* off, on, blink. Index is led_status_t */
4845         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4846         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4847
4848         int rc = 0;
4849
4850         switch (led_supported) {
4851         case TPACPI_LED_570:
4852                 /* 570 */
4853                 if (unlikely(led > 7))
4854                         return -EINVAL;
4855                 if (unlikely(tpacpi_is_led_restricted(led)))
4856                         return -EPERM;
4857                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4858                                 (1 << led), led_sled_arg1[ledstatus]))
4859                         rc = -EIO;
4860                 break;
4861         case TPACPI_LED_OLD:
4862                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4863                 if (unlikely(led > 7))
4864                         return -EINVAL;
4865                 if (unlikely(tpacpi_is_led_restricted(led)))
4866                         return -EPERM;
4867                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4868                 if (rc >= 0)
4869                         rc = ec_write(TPACPI_LED_EC_HLBL,
4870                                       (ledstatus == TPACPI_LED_BLINK) << led);
4871                 if (rc >= 0)
4872                         rc = ec_write(TPACPI_LED_EC_HLCL,
4873                                       (ledstatus != TPACPI_LED_OFF) << led);
4874                 break;
4875         case TPACPI_LED_NEW:
4876                 /* all others */
4877                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4878                         return -EINVAL;
4879                 if (unlikely(tpacpi_is_led_restricted(led)))
4880                         return -EPERM;
4881                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4882                                 led, led_led_arg1[ledstatus]))
4883                         rc = -EIO;
4884                 break;
4885         default:
4886                 rc = -ENXIO;
4887         }
4888
4889         if (!rc)
4890                 tpacpi_led_state_cache[led] = ledstatus;
4891
4892         return rc;
4893 }
4894
4895 static void led_set_status_worker(struct work_struct *work)
4896 {
4897         struct tpacpi_led_classdev *data =
4898                 container_of(work, struct tpacpi_led_classdev, work);
4899
4900         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4901                 led_set_status(data->led, data->new_state);
4902 }
4903
4904 static void led_sysfs_set(struct led_classdev *led_cdev,
4905                         enum led_brightness brightness)
4906 {
4907         struct tpacpi_led_classdev *data = container_of(led_cdev,
4908                              struct tpacpi_led_classdev, led_classdev);
4909
4910         if (brightness == LED_OFF)
4911                 data->new_state = TPACPI_LED_OFF;
4912         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
4913                 data->new_state = TPACPI_LED_ON;
4914         else
4915                 data->new_state = TPACPI_LED_BLINK;
4916
4917         queue_work(tpacpi_wq, &data->work);
4918 }
4919
4920 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4921                         unsigned long *delay_on, unsigned long *delay_off)
4922 {
4923         struct tpacpi_led_classdev *data = container_of(led_cdev,
4924                              struct tpacpi_led_classdev, led_classdev);
4925
4926         /* Can we choose the flash rate? */
4927         if (*delay_on == 0 && *delay_off == 0) {
4928                 /* yes. set them to the hardware blink rate (1 Hz) */
4929                 *delay_on = 500; /* ms */
4930                 *delay_off = 500; /* ms */
4931         } else if ((*delay_on != 500) || (*delay_off != 500))
4932                 return -EINVAL;
4933
4934         data->new_state = TPACPI_LED_BLINK;
4935         queue_work(tpacpi_wq, &data->work);
4936
4937         return 0;
4938 }
4939
4940 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4941 {
4942         int rc;
4943
4944         struct tpacpi_led_classdev *data = container_of(led_cdev,
4945                              struct tpacpi_led_classdev, led_classdev);
4946
4947         rc = led_get_status(data->led);
4948
4949         if (rc == TPACPI_LED_OFF || rc < 0)
4950                 rc = LED_OFF;   /* no error handling in led class :( */
4951         else
4952                 rc = LED_FULL;
4953
4954         return rc;
4955 }
4956
4957 static void led_exit(void)
4958 {
4959         unsigned int i;
4960
4961         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4962                 if (tpacpi_leds[i].led_classdev.name)
4963                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4964         }
4965
4966         kfree(tpacpi_leds);
4967 }
4968
4969 static int __init tpacpi_init_led(unsigned int led)
4970 {
4971         int rc;
4972
4973         tpacpi_leds[led].led = led;
4974
4975         /* LEDs with no name don't get registered */
4976         if (!tpacpi_led_names[led])
4977                 return 0;
4978
4979         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
4980         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
4981         if (led_supported == TPACPI_LED_570)
4982                 tpacpi_leds[led].led_classdev.brightness_get =
4983                                                 &led_sysfs_get;
4984
4985         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
4986
4987         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
4988
4989         rc = led_classdev_register(&tpacpi_pdev->dev,
4990                                 &tpacpi_leds[led].led_classdev);
4991         if (rc < 0)
4992                 tpacpi_leds[led].led_classdev.name = NULL;
4993
4994         return rc;
4995 }
4996
4997 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
4998         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
4999         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5000         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5001
5002         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5003         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5004         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5005         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5006         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5007         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5008         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5009         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5010
5011         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5012         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5013         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5014         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5015         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5016
5017         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5018         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5019         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5020         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5021
5022         /* (1) - may have excess leds enabled on MSB */
5023
5024         /* Defaults (order matters, keep last, don't reorder!) */
5025         { /* Lenovo */
5026           .vendor = PCI_VENDOR_ID_LENOVO,
5027           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5028           .quirks = 0x1fffU,
5029         },
5030         { /* IBM ThinkPads with no EC version string */
5031           .vendor = PCI_VENDOR_ID_IBM,
5032           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5033           .quirks = 0x00ffU,
5034         },
5035         { /* IBM ThinkPads with EC version string */
5036           .vendor = PCI_VENDOR_ID_IBM,
5037           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5038           .quirks = 0x00bfU,
5039         },
5040 };
5041
5042 #undef TPACPI_LEDQ_IBM
5043 #undef TPACPI_LEDQ_LNV
5044
5045 static int __init led_init(struct ibm_init_struct *iibm)
5046 {
5047         unsigned int i;
5048         int rc;
5049         unsigned long useful_leds;
5050
5051         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5052
5053         TPACPI_ACPIHANDLE_INIT(led);
5054
5055         if (!led_handle)
5056                 /* led not supported on R30, R31 */
5057                 led_supported = TPACPI_LED_NONE;
5058         else if (strlencmp(led_path, "SLED") == 0)
5059                 /* 570 */
5060                 led_supported = TPACPI_LED_570;
5061         else if (strlencmp(led_path, "SYSL") == 0)
5062                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5063                 led_supported = TPACPI_LED_OLD;
5064         else
5065                 /* all others */
5066                 led_supported = TPACPI_LED_NEW;
5067
5068         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5069                 str_supported(led_supported), led_supported);
5070
5071         if (led_supported == TPACPI_LED_NONE)
5072                 return 1;
5073
5074         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5075                               GFP_KERNEL);
5076         if (!tpacpi_leds) {
5077                 printk(TPACPI_ERR "Out of memory for LED data\n");
5078                 return -ENOMEM;
5079         }
5080
5081         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5082                                           ARRAY_SIZE(led_useful_qtable));
5083
5084         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5085                 if (!tpacpi_is_led_restricted(i) &&
5086                     test_bit(i, &useful_leds)) {
5087                         rc = tpacpi_init_led(i);
5088                         if (rc < 0) {
5089                                 led_exit();
5090                                 return rc;
5091                         }
5092                 }
5093         }
5094
5095 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5096         printk(TPACPI_NOTICE
5097                 "warning: userspace override of important "
5098                 "firmware LEDs is enabled\n");
5099 #endif
5100         return 0;
5101 }
5102
5103 #define str_led_status(s) \
5104         ((s) == TPACPI_LED_OFF ? "off" : \
5105                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5106
5107 static int led_read(char *p)
5108 {
5109         int len = 0;
5110
5111         if (!led_supported) {
5112                 len += sprintf(p + len, "status:\t\tnot supported\n");
5113                 return len;
5114         }
5115         len += sprintf(p + len, "status:\t\tsupported\n");
5116
5117         if (led_supported == TPACPI_LED_570) {
5118                 /* 570 */
5119                 int i, status;
5120                 for (i = 0; i < 8; i++) {
5121                         status = led_get_status(i);
5122                         if (status < 0)
5123                                 return -EIO;
5124                         len += sprintf(p + len, "%d:\t\t%s\n",
5125                                        i, str_led_status(status));
5126                 }
5127         }
5128
5129         len += sprintf(p + len, "commands:\t"
5130                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5131
5132         return len;
5133 }
5134
5135 static int led_write(char *buf)
5136 {
5137         char *cmd;
5138         int led, rc;
5139         enum led_status_t s;
5140
5141         if (!led_supported)
5142                 return -ENODEV;
5143
5144         while ((cmd = next_cmd(&buf))) {
5145                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5146                         return -EINVAL;
5147
5148                 if (strstr(cmd, "off")) {
5149                         s = TPACPI_LED_OFF;
5150                 } else if (strstr(cmd, "on")) {
5151                         s = TPACPI_LED_ON;
5152                 } else if (strstr(cmd, "blink")) {
5153                         s = TPACPI_LED_BLINK;
5154                 } else {
5155                         return -EINVAL;
5156                 }
5157
5158                 rc = led_set_status(led, s);
5159                 if (rc < 0)
5160                         return rc;
5161         }
5162
5163         return 0;
5164 }
5165
5166 static struct ibm_struct led_driver_data = {
5167         .name = "led",
5168         .read = led_read,
5169         .write = led_write,
5170         .exit = led_exit,
5171 };
5172
5173 /*************************************************************************
5174  * Beep subdriver
5175  */
5176
5177 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5178
5179 #define TPACPI_BEEP_Q1 0x0001
5180
5181 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5182         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5183         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5184 };
5185
5186 static int __init beep_init(struct ibm_init_struct *iibm)
5187 {
5188         unsigned long quirks;
5189
5190         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5191
5192         TPACPI_ACPIHANDLE_INIT(beep);
5193
5194         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5195                 str_supported(beep_handle != NULL));
5196
5197         quirks = tpacpi_check_quirks(beep_quirk_table,
5198                                      ARRAY_SIZE(beep_quirk_table));
5199
5200         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5201
5202         return (beep_handle)? 0 : 1;
5203 }
5204
5205 static int beep_read(char *p)
5206 {
5207         int len = 0;
5208
5209         if (!beep_handle)
5210                 len += sprintf(p + len, "status:\t\tnot supported\n");
5211         else {
5212                 len += sprintf(p + len, "status:\t\tsupported\n");
5213                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5214         }
5215
5216         return len;
5217 }
5218
5219 static int beep_write(char *buf)
5220 {
5221         char *cmd;
5222         int beep_cmd;
5223
5224         if (!beep_handle)
5225                 return -ENODEV;
5226
5227         while ((cmd = next_cmd(&buf))) {
5228                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5229                     beep_cmd >= 0 && beep_cmd <= 17) {
5230                         /* beep_cmd set */
5231                 } else
5232                         return -EINVAL;
5233                 if (tp_features.beep_needs_two_args) {
5234                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5235                                         beep_cmd, 0))
5236                                 return -EIO;
5237                 } else {
5238                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5239                                         beep_cmd))
5240                                 return -EIO;
5241                 }
5242         }
5243
5244         return 0;
5245 }
5246
5247 static struct ibm_struct beep_driver_data = {
5248         .name = "beep",
5249         .read = beep_read,
5250         .write = beep_write,
5251 };
5252
5253 /*************************************************************************
5254  * Thermal subdriver
5255  */
5256
5257 enum thermal_access_mode {
5258         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5259         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5260         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5261         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5262         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5263 };
5264
5265 enum { /* TPACPI_THERMAL_TPEC_* */
5266         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5267         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5268         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5269 };
5270
5271 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5272 struct ibm_thermal_sensors_struct {
5273         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5274 };
5275
5276 static enum thermal_access_mode thermal_read_mode;
5277
5278 /* idx is zero-based */
5279 static int thermal_get_sensor(int idx, s32 *value)
5280 {
5281         int t;
5282         s8 tmp;
5283         char tmpi[5];
5284
5285         t = TP_EC_THERMAL_TMP0;
5286
5287         switch (thermal_read_mode) {
5288 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5289         case TPACPI_THERMAL_TPEC_16:
5290                 if (idx >= 8 && idx <= 15) {
5291                         t = TP_EC_THERMAL_TMP8;
5292                         idx -= 8;
5293                 }
5294                 /* fallthrough */
5295 #endif
5296         case TPACPI_THERMAL_TPEC_8:
5297                 if (idx <= 7) {
5298                         if (!acpi_ec_read(t + idx, &tmp))
5299                                 return -EIO;
5300                         *value = tmp * 1000;
5301                         return 0;
5302                 }
5303                 break;
5304
5305         case TPACPI_THERMAL_ACPI_UPDT:
5306                 if (idx <= 7) {
5307                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5308                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5309                                 return -EIO;
5310                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5311                                 return -EIO;
5312                         *value = (t - 2732) * 100;
5313                         return 0;
5314                 }
5315                 break;
5316
5317         case TPACPI_THERMAL_ACPI_TMP07:
5318                 if (idx <= 7) {
5319                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5320                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5321                                 return -EIO;
5322                         if (t > 127 || t < -127)
5323                                 t = TP_EC_THERMAL_TMP_NA;
5324                         *value = t * 1000;
5325                         return 0;
5326                 }
5327                 break;
5328
5329         case TPACPI_THERMAL_NONE:
5330         default:
5331                 return -ENOSYS;
5332         }
5333
5334         return -EINVAL;
5335 }
5336
5337 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5338 {
5339         int res, i;
5340         int n;
5341
5342         n = 8;
5343         i = 0;
5344
5345         if (!s)
5346                 return -EINVAL;
5347
5348         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5349                 n = 16;
5350
5351         for (i = 0 ; i < n; i++) {
5352                 res = thermal_get_sensor(i, &s->temp[i]);
5353                 if (res)
5354                         return res;
5355         }
5356
5357         return n;
5358 }
5359
5360 /* sysfs temp##_input -------------------------------------------------- */
5361
5362 static ssize_t thermal_temp_input_show(struct device *dev,
5363                            struct device_attribute *attr,
5364                            char *buf)
5365 {
5366         struct sensor_device_attribute *sensor_attr =
5367                                         to_sensor_dev_attr(attr);
5368         int idx = sensor_attr->index;
5369         s32 value;
5370         int res;
5371
5372         res = thermal_get_sensor(idx, &value);
5373         if (res)
5374                 return res;
5375         if (value == TP_EC_THERMAL_TMP_NA * 1000)
5376                 return -ENXIO;
5377
5378         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5379 }
5380
5381 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5382          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5383                      thermal_temp_input_show, NULL, _idxB)
5384
5385 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5386         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5387         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5388         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5389         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5390         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5391         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5392         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5393         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5394         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5395         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5396         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5397         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5398         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5399         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5400         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5401         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5402 };
5403
5404 #define THERMAL_ATTRS(X) \
5405         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5406
5407 static struct attribute *thermal_temp_input_attr[] = {
5408         THERMAL_ATTRS(8),
5409         THERMAL_ATTRS(9),
5410         THERMAL_ATTRS(10),
5411         THERMAL_ATTRS(11),
5412         THERMAL_ATTRS(12),
5413         THERMAL_ATTRS(13),
5414         THERMAL_ATTRS(14),
5415         THERMAL_ATTRS(15),
5416         THERMAL_ATTRS(0),
5417         THERMAL_ATTRS(1),
5418         THERMAL_ATTRS(2),
5419         THERMAL_ATTRS(3),
5420         THERMAL_ATTRS(4),
5421         THERMAL_ATTRS(5),
5422         THERMAL_ATTRS(6),
5423         THERMAL_ATTRS(7),
5424         NULL
5425 };
5426
5427 static const struct attribute_group thermal_temp_input16_group = {
5428         .attrs = thermal_temp_input_attr
5429 };
5430
5431 static const struct attribute_group thermal_temp_input8_group = {
5432         .attrs = &thermal_temp_input_attr[8]
5433 };
5434
5435 #undef THERMAL_SENSOR_ATTR_TEMP
5436 #undef THERMAL_ATTRS
5437
5438 /* --------------------------------------------------------------------- */
5439
5440 static int __init thermal_init(struct ibm_init_struct *iibm)
5441 {
5442         u8 t, ta1, ta2;
5443         int i;
5444         int acpi_tmp7;
5445         int res;
5446
5447         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5448
5449         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5450
5451         if (thinkpad_id.ec_model) {
5452                 /*
5453                  * Direct EC access mode: sensors at registers
5454                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5455                  * non-implemented, thermal sensors return 0x80 when
5456                  * not available
5457                  */
5458
5459                 ta1 = ta2 = 0;
5460                 for (i = 0; i < 8; i++) {
5461                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5462                                 ta1 |= t;
5463                         } else {
5464                                 ta1 = 0;
5465                                 break;
5466                         }
5467                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5468                                 ta2 |= t;
5469                         } else {
5470                                 ta1 = 0;
5471                                 break;
5472                         }
5473                 }
5474                 if (ta1 == 0) {
5475                         /* This is sheer paranoia, but we handle it anyway */
5476                         if (acpi_tmp7) {
5477                                 printk(TPACPI_ERR
5478                                        "ThinkPad ACPI EC access misbehaving, "
5479                                        "falling back to ACPI TMPx access "
5480                                        "mode\n");
5481                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5482                         } else {
5483                                 printk(TPACPI_ERR
5484                                        "ThinkPad ACPI EC access misbehaving, "
5485                                        "disabling thermal sensors access\n");
5486                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5487                         }
5488                 } else {
5489                         thermal_read_mode =
5490                             (ta2 != 0) ?
5491                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5492                 }
5493         } else if (acpi_tmp7) {
5494                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5495                         /* 600e/x, 770e, 770x */
5496                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5497                 } else {
5498                         /* Standard ACPI TMPx access, max 8 sensors */
5499                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5500                 }
5501         } else {
5502                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5503                 thermal_read_mode = TPACPI_THERMAL_NONE;
5504         }
5505
5506         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5507                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5508                 thermal_read_mode);
5509
5510         switch (thermal_read_mode) {
5511         case TPACPI_THERMAL_TPEC_16:
5512                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5513                                 &thermal_temp_input16_group);
5514                 if (res)
5515                         return res;
5516                 break;
5517         case TPACPI_THERMAL_TPEC_8:
5518         case TPACPI_THERMAL_ACPI_TMP07:
5519         case TPACPI_THERMAL_ACPI_UPDT:
5520                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5521                                 &thermal_temp_input8_group);
5522                 if (res)
5523                         return res;
5524                 break;
5525         case TPACPI_THERMAL_NONE:
5526         default:
5527                 return 1;
5528         }
5529
5530         return 0;
5531 }
5532
5533 static void thermal_exit(void)
5534 {
5535         switch (thermal_read_mode) {
5536         case TPACPI_THERMAL_TPEC_16:
5537                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5538                                    &thermal_temp_input16_group);
5539                 break;
5540         case TPACPI_THERMAL_TPEC_8:
5541         case TPACPI_THERMAL_ACPI_TMP07:
5542         case TPACPI_THERMAL_ACPI_UPDT:
5543                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5544                                    &thermal_temp_input16_group);
5545                 break;
5546         case TPACPI_THERMAL_NONE:
5547         default:
5548                 break;
5549         }
5550 }
5551
5552 static int thermal_read(char *p)
5553 {
5554         int len = 0;
5555         int n, i;
5556         struct ibm_thermal_sensors_struct t;
5557
5558         n = thermal_get_sensors(&t);
5559         if (unlikely(n < 0))
5560                 return n;
5561
5562         len += sprintf(p + len, "temperatures:\t");
5563
5564         if (n > 0) {
5565                 for (i = 0; i < (n - 1); i++)
5566                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5567                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5568         } else
5569                 len += sprintf(p + len, "not supported\n");
5570
5571         return len;
5572 }
5573
5574 static struct ibm_struct thermal_driver_data = {
5575         .name = "thermal",
5576         .read = thermal_read,
5577         .exit = thermal_exit,
5578 };
5579
5580 /*************************************************************************
5581  * EC Dump subdriver
5582  */
5583
5584 static u8 ecdump_regs[256];
5585
5586 static int ecdump_read(char *p)
5587 {
5588         int len = 0;
5589         int i, j;
5590         u8 v;
5591
5592         len += sprintf(p + len, "EC      "
5593                        " +00 +01 +02 +03 +04 +05 +06 +07"
5594                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5595         for (i = 0; i < 256; i += 16) {
5596                 len += sprintf(p + len, "EC 0x%02x:", i);
5597                 for (j = 0; j < 16; j++) {
5598                         if (!acpi_ec_read(i + j, &v))
5599                                 break;
5600                         if (v != ecdump_regs[i + j])
5601                                 len += sprintf(p + len, " *%02x", v);
5602                         else
5603                                 len += sprintf(p + len, "  %02x", v);
5604                         ecdump_regs[i + j] = v;
5605                 }
5606                 len += sprintf(p + len, "\n");
5607                 if (j != 16)
5608                         break;
5609         }
5610
5611         /* These are way too dangerous to advertise openly... */
5612 #if 0
5613         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5614                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5615         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
5616                        " (<offset> is 00-ff, <value> is 0-255)\n");
5617 #endif
5618         return len;
5619 }
5620
5621 static int ecdump_write(char *buf)
5622 {
5623         char *cmd;
5624         int i, v;
5625
5626         while ((cmd = next_cmd(&buf))) {
5627                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5628                         /* i and v set */
5629                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5630                         /* i and v set */
5631                 } else
5632                         return -EINVAL;
5633                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5634                         if (!acpi_ec_write(i, v))
5635                                 return -EIO;
5636                 } else
5637                         return -EINVAL;
5638         }
5639
5640         return 0;
5641 }
5642
5643 static struct ibm_struct ecdump_driver_data = {
5644         .name = "ecdump",
5645         .read = ecdump_read,
5646         .write = ecdump_write,
5647         .flags.experimental = 1,
5648 };
5649
5650 /*************************************************************************
5651  * Backlight/brightness subdriver
5652  */
5653
5654 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5655
5656 /*
5657  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5658  * CMOS NVRAM byte 0x5E, bits 0-3.
5659  *
5660  * EC HBRV (0x31) has the following layout
5661  *   Bit 7: unknown function
5662  *   Bit 6: unknown function
5663  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5664  *   Bit 4: must be set to zero to avoid problems
5665  *   Bit 3-0: backlight brightness level
5666  *
5667  * brightness_get_raw returns status data in the HBRV layout
5668  *
5669  * WARNING: The X61 has been verified to use HBRV for something else, so
5670  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5671  * testing on the very early *60 Lenovo models...
5672  */
5673
5674 enum {
5675         TP_EC_BACKLIGHT = 0x31,
5676
5677         /* TP_EC_BACKLIGHT bitmasks */
5678         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5679         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5680         TP_EC_BACKLIGHT_MAPSW = 0x20,
5681 };
5682
5683 enum tpacpi_brightness_access_mode {
5684         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5685         TPACPI_BRGHT_MODE_EC,           /* EC control */
5686         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5687         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5688         TPACPI_BRGHT_MODE_MAX
5689 };
5690
5691 static struct backlight_device *ibm_backlight_device;
5692
5693 static enum tpacpi_brightness_access_mode brightness_mode =
5694                 TPACPI_BRGHT_MODE_MAX;
5695
5696 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5697
5698 static struct mutex brightness_mutex;
5699
5700 /* NVRAM brightness access,
5701  * call with brightness_mutex held! */
5702 static unsigned int tpacpi_brightness_nvram_get(void)
5703 {
5704         u8 lnvram;
5705
5706         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5707                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5708                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5709         lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5710
5711         return lnvram;
5712 }
5713
5714 static void tpacpi_brightness_checkpoint_nvram(void)
5715 {
5716         u8 lec = 0;
5717         u8 b_nvram;
5718
5719         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5720                 return;
5721
5722         vdbg_printk(TPACPI_DBG_BRGHT,
5723                 "trying to checkpoint backlight level to NVRAM...\n");
5724
5725         if (mutex_lock_killable(&brightness_mutex) < 0)
5726                 return;
5727
5728         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5729                 goto unlock;
5730         lec &= TP_EC_BACKLIGHT_LVLMSK;
5731         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5732
5733         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5734                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5735                 /* NVRAM needs update */
5736                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5737                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5738                 b_nvram |= lec;
5739                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5740                 dbg_printk(TPACPI_DBG_BRGHT,
5741                            "updated NVRAM backlight level to %u (0x%02x)\n",
5742                            (unsigned int) lec, (unsigned int) b_nvram);
5743         } else
5744                 vdbg_printk(TPACPI_DBG_BRGHT,
5745                            "NVRAM backlight level already is %u (0x%02x)\n",
5746                            (unsigned int) lec, (unsigned int) b_nvram);
5747
5748 unlock:
5749         mutex_unlock(&brightness_mutex);
5750 }
5751
5752
5753 /* call with brightness_mutex held! */
5754 static int tpacpi_brightness_get_raw(int *status)
5755 {
5756         u8 lec = 0;
5757
5758         switch (brightness_mode) {
5759         case TPACPI_BRGHT_MODE_UCMS_STEP:
5760                 *status = tpacpi_brightness_nvram_get();
5761                 return 0;
5762         case TPACPI_BRGHT_MODE_EC:
5763         case TPACPI_BRGHT_MODE_ECNVRAM:
5764                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5765                         return -EIO;
5766                 *status = lec;
5767                 return 0;
5768         default:
5769                 return -ENXIO;
5770         }
5771 }
5772
5773 /* call with brightness_mutex held! */
5774 /* do NOT call with illegal backlight level value */
5775 static int tpacpi_brightness_set_ec(unsigned int value)
5776 {
5777         u8 lec = 0;
5778
5779         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5780                 return -EIO;
5781
5782         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5783                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5784                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
5785                 return -EIO;
5786
5787         return 0;
5788 }
5789
5790 /* call with brightness_mutex held! */
5791 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5792 {
5793         int cmos_cmd, inc;
5794         unsigned int current_value, i;
5795
5796         current_value = tpacpi_brightness_nvram_get();
5797
5798         if (value == current_value)
5799                 return 0;
5800
5801         cmos_cmd = (value > current_value) ?
5802                         TP_CMOS_BRIGHTNESS_UP :
5803                         TP_CMOS_BRIGHTNESS_DOWN;
5804         inc = (value > current_value) ? 1 : -1;
5805
5806         for (i = current_value; i != value; i += inc)
5807                 if (issue_thinkpad_cmos_command(cmos_cmd))
5808                         return -EIO;
5809
5810         return 0;
5811 }
5812
5813 /* May return EINTR which can always be mapped to ERESTARTSYS */
5814 static int brightness_set(unsigned int value)
5815 {
5816         int res;
5817
5818         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5819             value < 0)
5820                 return -EINVAL;
5821
5822         vdbg_printk(TPACPI_DBG_BRGHT,
5823                         "set backlight level to %d\n", value);
5824
5825         res = mutex_lock_killable(&brightness_mutex);
5826         if (res < 0)
5827                 return res;
5828
5829         switch (brightness_mode) {
5830         case TPACPI_BRGHT_MODE_EC:
5831         case TPACPI_BRGHT_MODE_ECNVRAM:
5832                 res = tpacpi_brightness_set_ec(value);
5833                 break;
5834         case TPACPI_BRGHT_MODE_UCMS_STEP:
5835                 res = tpacpi_brightness_set_ucmsstep(value);
5836                 break;
5837         default:
5838                 res = -ENXIO;
5839         }
5840
5841         mutex_unlock(&brightness_mutex);
5842         return res;
5843 }
5844
5845 /* sysfs backlight class ----------------------------------------------- */
5846
5847 static int brightness_update_status(struct backlight_device *bd)
5848 {
5849         unsigned int level =
5850                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5851                  bd->props.power == FB_BLANK_UNBLANK) ?
5852                                 bd->props.brightness : 0;
5853
5854         dbg_printk(TPACPI_DBG_BRGHT,
5855                         "backlight: attempt to set level to %d\n",
5856                         level);
5857
5858         /* it is the backlight class's job (caller) to handle
5859          * EINTR and other errors properly */
5860         return brightness_set(level);
5861 }
5862
5863 static int brightness_get(struct backlight_device *bd)
5864 {
5865         int status, res;
5866
5867         res = mutex_lock_killable(&brightness_mutex);
5868         if (res < 0)
5869                 return 0;
5870
5871         res = tpacpi_brightness_get_raw(&status);
5872
5873         mutex_unlock(&brightness_mutex);
5874
5875         if (res < 0)
5876                 return 0;
5877
5878         return status & TP_EC_BACKLIGHT_LVLMSK;
5879 }
5880
5881 static struct backlight_ops ibm_backlight_data = {
5882         .get_brightness = brightness_get,
5883         .update_status  = brightness_update_status,
5884 };
5885
5886 /* --------------------------------------------------------------------- */
5887
5888 /*
5889  * These are only useful for models that have only one possibility
5890  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
5891  * these quirks.
5892  */
5893 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
5894 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
5895 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
5896
5897 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
5898         /* Models with ATI GPUs known to require ECNVRAM mode */
5899         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
5900
5901         /* Models with ATI GPUs that can use ECNVRAM */
5902         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
5903         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5904         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5905         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5906
5907         /* Models with Intel Extreme Graphics 2 */
5908         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
5909         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5910         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5911
5912         /* Models with Intel GMA900 */
5913         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
5914         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
5915         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
5916 };
5917
5918 static int __init brightness_init(struct ibm_init_struct *iibm)
5919 {
5920         int b;
5921         unsigned long quirks;
5922
5923         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5924
5925         mutex_init(&brightness_mutex);
5926
5927         quirks = tpacpi_check_quirks(brightness_quirk_table,
5928                                 ARRAY_SIZE(brightness_quirk_table));
5929
5930         /*
5931          * We always attempt to detect acpi support, so as to switch
5932          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5933          * going to publish a backlight interface
5934          */
5935         b = tpacpi_check_std_acpi_brightness_support();
5936         if (b > 0) {
5937
5938                 if (acpi_video_backlight_support()) {
5939                         if (brightness_enable > 1) {
5940                                 printk(TPACPI_NOTICE
5941                                        "Standard ACPI backlight interface "
5942                                        "available, not loading native one.\n");
5943                                 return 1;
5944                         } else if (brightness_enable == 1) {
5945                                 printk(TPACPI_NOTICE
5946                                        "Backlight control force enabled, even if standard "
5947                                        "ACPI backlight interface is available\n");
5948                         }
5949                 } else {
5950                         if (brightness_enable > 1) {
5951                                 printk(TPACPI_NOTICE
5952                                        "Standard ACPI backlight interface not "
5953                                        "available, thinkpad_acpi native "
5954                                        "brightness control enabled\n");
5955                         }
5956                 }
5957         }
5958
5959         if (!brightness_enable) {
5960                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5961                            "brightness support disabled by "
5962                            "module parameter\n");
5963                 return 1;
5964         }
5965
5966         if (b > 16) {
5967                 printk(TPACPI_ERR
5968                        "Unsupported brightness interface, "
5969                        "please contact %s\n", TPACPI_MAIL);
5970                 return 1;
5971         }
5972         if (b == 16)
5973                 tp_features.bright_16levels = 1;
5974
5975         /*
5976          * Check for module parameter bogosity, note that we
5977          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
5978          * able to detect "unspecified"
5979          */
5980         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
5981                 return -EINVAL;
5982
5983         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
5984         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
5985             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
5986                 if (quirks & TPACPI_BRGHT_Q_EC)
5987                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
5988                 else
5989                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5990
5991                 dbg_printk(TPACPI_DBG_BRGHT,
5992                            "driver auto-selected brightness_mode=%d\n",
5993                            brightness_mode);
5994         }
5995
5996         /* Safety */
5997         if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
5998             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
5999              brightness_mode == TPACPI_BRGHT_MODE_EC))
6000                 return -EINVAL;
6001
6002         if (tpacpi_brightness_get_raw(&b) < 0)
6003                 return 1;
6004
6005         if (tp_features.bright_16levels)
6006                 printk(TPACPI_INFO
6007                        "detected a 16-level brightness capable ThinkPad\n");
6008
6009         ibm_backlight_device = backlight_device_register(
6010                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6011                                         &ibm_backlight_data);
6012         if (IS_ERR(ibm_backlight_device)) {
6013                 printk(TPACPI_ERR "Could not register backlight device\n");
6014                 return PTR_ERR(ibm_backlight_device);
6015         }
6016         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6017                         "brightness is supported\n");
6018
6019         if (quirks & TPACPI_BRGHT_Q_ASK) {
6020                 printk(TPACPI_NOTICE
6021                         "brightness: will use unverified default: "
6022                         "brightness_mode=%d\n", brightness_mode);
6023                 printk(TPACPI_NOTICE
6024                         "brightness: please report to %s whether it works well "
6025                         "or not on your ThinkPad\n", TPACPI_MAIL);
6026         }
6027
6028         ibm_backlight_device->props.max_brightness =
6029                                 (tp_features.bright_16levels)? 15 : 7;
6030         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6031         backlight_update_status(ibm_backlight_device);
6032
6033         return 0;
6034 }
6035
6036 static void brightness_suspend(pm_message_t state)
6037 {
6038         tpacpi_brightness_checkpoint_nvram();
6039 }
6040
6041 static void brightness_shutdown(void)
6042 {
6043         tpacpi_brightness_checkpoint_nvram();
6044 }
6045
6046 static void brightness_exit(void)
6047 {
6048         if (ibm_backlight_device) {
6049                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6050                             "calling backlight_device_unregister()\n");
6051                 backlight_device_unregister(ibm_backlight_device);
6052         }
6053
6054         tpacpi_brightness_checkpoint_nvram();
6055 }
6056
6057 static int brightness_read(char *p)
6058 {
6059         int len = 0;
6060         int level;
6061
6062         level = brightness_get(NULL);
6063         if (level < 0) {
6064                 len += sprintf(p + len, "level:\t\tunreadable\n");
6065         } else {
6066                 len += sprintf(p + len, "level:\t\t%d\n", level);
6067                 len += sprintf(p + len, "commands:\tup, down\n");
6068                 len += sprintf(p + len, "commands:\tlevel <level>"
6069                                " (<level> is 0-%d)\n",
6070                                (tp_features.bright_16levels) ? 15 : 7);
6071         }
6072
6073         return len;
6074 }
6075
6076 static int brightness_write(char *buf)
6077 {
6078         int level;
6079         int rc;
6080         char *cmd;
6081         int max_level = (tp_features.bright_16levels) ? 15 : 7;
6082
6083         level = brightness_get(NULL);
6084         if (level < 0)
6085                 return level;
6086
6087         while ((cmd = next_cmd(&buf))) {
6088                 if (strlencmp(cmd, "up") == 0) {
6089                         if (level < max_level)
6090                                 level++;
6091                 } else if (strlencmp(cmd, "down") == 0) {
6092                         if (level > 0)
6093                                 level--;
6094                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6095                            level >= 0 && level <= max_level) {
6096                         /* new level set */
6097                 } else
6098                         return -EINVAL;
6099         }
6100
6101         tpacpi_disclose_usertask("procfs brightness",
6102                         "set level to %d\n", level);
6103
6104         /*
6105          * Now we know what the final level should be, so we try to set it.
6106          * Doing it this way makes the syscall restartable in case of EINTR
6107          */
6108         rc = brightness_set(level);
6109         return (rc == -EINTR)? ERESTARTSYS : rc;
6110 }
6111
6112 static struct ibm_struct brightness_driver_data = {
6113         .name = "brightness",
6114         .read = brightness_read,
6115         .write = brightness_write,
6116         .exit = brightness_exit,
6117         .suspend = brightness_suspend,
6118         .shutdown = brightness_shutdown,
6119 };
6120
6121 /*************************************************************************
6122  * Volume subdriver
6123  */
6124
6125 static int volume_offset = 0x30;
6126
6127 static int volume_read(char *p)
6128 {
6129         int len = 0;
6130         u8 level;
6131
6132         if (!acpi_ec_read(volume_offset, &level)) {
6133                 len += sprintf(p + len, "level:\t\tunreadable\n");
6134         } else {
6135                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
6136                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
6137                 len += sprintf(p + len, "commands:\tup, down, mute\n");
6138                 len += sprintf(p + len, "commands:\tlevel <level>"
6139                                " (<level> is 0-15)\n");
6140         }
6141
6142         return len;
6143 }
6144
6145 static int volume_write(char *buf)
6146 {
6147         int cmos_cmd, inc, i;
6148         u8 level, mute;
6149         int new_level, new_mute;
6150         char *cmd;
6151
6152         while ((cmd = next_cmd(&buf))) {
6153                 if (!acpi_ec_read(volume_offset, &level))
6154                         return -EIO;
6155                 new_mute = mute = level & 0x40;
6156                 new_level = level = level & 0xf;
6157
6158                 if (strlencmp(cmd, "up") == 0) {
6159                         if (mute)
6160                                 new_mute = 0;
6161                         else
6162                                 new_level = level == 15 ? 15 : level + 1;
6163                 } else if (strlencmp(cmd, "down") == 0) {
6164                         if (mute)
6165                                 new_mute = 0;
6166                         else
6167                                 new_level = level == 0 ? 0 : level - 1;
6168                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6169                            new_level >= 0 && new_level <= 15) {
6170                         /* new_level set */
6171                 } else if (strlencmp(cmd, "mute") == 0) {
6172                         new_mute = 0x40;
6173                 } else
6174                         return -EINVAL;
6175
6176                 if (new_level != level) {
6177                         /* mute doesn't change */
6178
6179                         cmos_cmd = (new_level > level) ?
6180                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6181                         inc = new_level > level ? 1 : -1;
6182
6183                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6184                                      !acpi_ec_write(volume_offset, level)))
6185                                 return -EIO;
6186
6187                         for (i = level; i != new_level; i += inc)
6188                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6189                                     !acpi_ec_write(volume_offset, i + inc))
6190                                         return -EIO;
6191
6192                         if (mute &&
6193                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6194                              !acpi_ec_write(volume_offset, new_level + mute))) {
6195                                 return -EIO;
6196                         }
6197                 }
6198
6199                 if (new_mute != mute) {
6200                         /* level doesn't change */
6201
6202                         cmos_cmd = (new_mute) ?
6203                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6204
6205                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
6206                             !acpi_ec_write(volume_offset, level + new_mute))
6207                                 return -EIO;
6208                 }
6209         }
6210
6211         return 0;
6212 }
6213
6214 static struct ibm_struct volume_driver_data = {
6215         .name = "volume",
6216         .read = volume_read,
6217         .write = volume_write,
6218 };
6219
6220 /*************************************************************************
6221  * Fan subdriver
6222  */
6223
6224 /*
6225  * FAN ACCESS MODES
6226  *
6227  * TPACPI_FAN_RD_ACPI_GFAN:
6228  *      ACPI GFAN method: returns fan level
6229  *
6230  *      see TPACPI_FAN_WR_ACPI_SFAN
6231  *      EC 0x2f (HFSP) not available if GFAN exists
6232  *
6233  * TPACPI_FAN_WR_ACPI_SFAN:
6234  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6235  *
6236  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
6237  *      it for writing.
6238  *
6239  * TPACPI_FAN_WR_TPEC:
6240  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
6241  *      Supported on almost all ThinkPads
6242  *
6243  *      Fan speed changes of any sort (including those caused by the
6244  *      disengaged mode) are usually done slowly by the firmware as the
6245  *      maximum ammount of fan duty cycle change per second seems to be
6246  *      limited.
6247  *
6248  *      Reading is not available if GFAN exists.
6249  *      Writing is not available if SFAN exists.
6250  *
6251  *      Bits
6252  *       7      automatic mode engaged;
6253  *              (default operation mode of the ThinkPad)
6254  *              fan level is ignored in this mode.
6255  *       6      full speed mode (takes precedence over bit 7);
6256  *              not available on all thinkpads.  May disable
6257  *              the tachometer while the fan controller ramps up
6258  *              the speed (which can take up to a few *minutes*).
6259  *              Speeds up fan to 100% duty-cycle, which is far above
6260  *              the standard RPM levels.  It is not impossible that
6261  *              it could cause hardware damage.
6262  *      5-3     unused in some models.  Extra bits for fan level
6263  *              in others, but still useless as all values above
6264  *              7 map to the same speed as level 7 in these models.
6265  *      2-0     fan level (0..7 usually)
6266  *                      0x00 = stop
6267  *                      0x07 = max (set when temperatures critical)
6268  *              Some ThinkPads may have other levels, see
6269  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6270  *
6271  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6272  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6273  *      does so, its initial value is meaningless (0x07).
6274  *
6275  *      For firmware bugs, refer to:
6276  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6277  *
6278  *      ----
6279  *
6280  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6281  *      Main fan tachometer reading (in RPM)
6282  *
6283  *      This register is present on all ThinkPads with a new-style EC, and
6284  *      it is known not to be present on the A21m/e, and T22, as there is
6285  *      something else in offset 0x84 according to the ACPI DSDT.  Other
6286  *      ThinkPads from this same time period (and earlier) probably lack the
6287  *      tachometer as well.
6288  *
6289  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6290  *      was never fixed by IBM to report the EC firmware version string
6291  *      probably support the tachometer (like the early X models), so
6292  *      detecting it is quite hard.  We need more data to know for sure.
6293  *
6294  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6295  *      might result.
6296  *
6297  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
6298  *      mode.
6299  *
6300  *      For firmware bugs, refer to:
6301  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6302  *
6303  *      ----
6304  *
6305  *      ThinkPad EC register 0x31 bit 0 (only on select models)
6306  *
6307  *      When bit 0 of EC register 0x31 is zero, the tachometer registers
6308  *      show the speed of the main fan.  When bit 0 of EC register 0x31
6309  *      is one, the tachometer registers show the speed of the auxiliary
6310  *      fan.
6311  *
6312  *      Fan control seems to affect both fans, regardless of the state
6313  *      of this bit.
6314  *
6315  *      So far, only the firmware for the X60/X61 non-tablet versions
6316  *      seem to support this (firmware TP-7M).
6317  *
6318  * TPACPI_FAN_WR_ACPI_FANS:
6319  *      ThinkPad X31, X40, X41.  Not available in the X60.
6320  *
6321  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
6322  *      high speed.  ACPI DSDT seems to map these three speeds to levels
6323  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6324  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6325  *
6326  *      The speeds are stored on handles
6327  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6328  *
6329  *      There are three default speed sets, acessible as handles:
6330  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6331  *
6332  *      ACPI DSDT switches which set is in use depending on various
6333  *      factors.
6334  *
6335  *      TPACPI_FAN_WR_TPEC is also available and should be used to
6336  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
6337  *      but the ACPI tables just mention level 7.
6338  */
6339
6340 enum {                                  /* Fan control constants */
6341         fan_status_offset = 0x2f,       /* EC register 0x2f */
6342         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
6343                                          * 0x84 must be read before 0x85 */
6344         fan_select_offset = 0x31,       /* EC register 0x31 (Firmware 7M)
6345                                            bit 0 selects which fan is active */
6346
6347         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
6348         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
6349
6350         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
6351 };
6352
6353 enum fan_status_access_mode {
6354         TPACPI_FAN_NONE = 0,            /* No fan status or control */
6355         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
6356         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6357 };
6358
6359 enum fan_control_access_mode {
6360         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
6361         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
6362         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
6363         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
6364 };
6365
6366 enum fan_control_commands {
6367         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
6368         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
6369         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
6370                                                  * and also watchdog cmd */
6371 };
6372
6373 static int fan_control_allowed;
6374
6375 static enum fan_status_access_mode fan_status_access_mode;
6376 static enum fan_control_access_mode fan_control_access_mode;
6377 static enum fan_control_commands fan_control_commands;
6378
6379 static u8 fan_control_initial_status;
6380 static u8 fan_control_desired_level;
6381 static u8 fan_control_resume_level;
6382 static int fan_watchdog_maxinterval;
6383
6384 static struct mutex fan_mutex;
6385
6386 static void fan_watchdog_fire(struct work_struct *ignored);
6387 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6388
6389 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
6390 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6391            "\\FSPD",            /* 600e/x, 770e, 770x */
6392            );                   /* all others */
6393 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6394            "JFNS",              /* 770x-JL */
6395            );                   /* all others */
6396
6397 /*
6398  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6399  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6400  * be in auto mode (0x80).
6401  *
6402  * This is corrected by any write to HFSP either by the driver, or
6403  * by the firmware.
6404  *
6405  * We assume 0x07 really means auto mode while this quirk is active,
6406  * as this is far more likely than the ThinkPad being in level 7,
6407  * which is only used by the firmware during thermal emergencies.
6408  *
6409  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
6410  * TP-70 (T43, R52), which are known to be buggy.
6411  */
6412
6413 static void fan_quirk1_setup(void)
6414 {
6415         if (fan_control_initial_status == 0x07) {
6416                 printk(TPACPI_NOTICE
6417                        "fan_init: initial fan status is unknown, "
6418                        "assuming it is in auto mode\n");
6419                 tp_features.fan_ctrl_status_undef = 1;
6420         }
6421 }
6422
6423 static void fan_quirk1_handle(u8 *fan_status)
6424 {
6425         if (unlikely(tp_features.fan_ctrl_status_undef)) {
6426                 if (*fan_status != fan_control_initial_status) {
6427                         /* something changed the HFSP regisnter since
6428                          * driver init time, so it is not undefined
6429                          * anymore */
6430                         tp_features.fan_ctrl_status_undef = 0;
6431                 } else {
6432                         /* Return most likely status. In fact, it
6433                          * might be the only possible status */
6434                         *fan_status = TP_EC_FAN_AUTO;
6435                 }
6436         }
6437 }
6438
6439 /* Select main fan on X60/X61, NOOP on others */
6440 static bool fan_select_fan1(void)
6441 {
6442         if (tp_features.second_fan) {
6443                 u8 val;
6444
6445                 if (ec_read(fan_select_offset, &val) < 0)
6446                         return false;
6447                 val &= 0xFEU;
6448                 if (ec_write(fan_select_offset, val) < 0)
6449                         return false;
6450         }
6451         return true;
6452 }
6453
6454 /* Select secondary fan on X60/X61 */
6455 static bool fan_select_fan2(void)
6456 {
6457         u8 val;
6458
6459         if (!tp_features.second_fan)
6460                 return false;
6461
6462         if (ec_read(fan_select_offset, &val) < 0)
6463                 return false;
6464         val |= 0x01U;
6465         if (ec_write(fan_select_offset, val) < 0)
6466                 return false;
6467
6468         return true;
6469 }
6470
6471 /*
6472  * Call with fan_mutex held
6473  */
6474 static void fan_update_desired_level(u8 status)
6475 {
6476         if ((status &
6477              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6478                 if (status > 7)
6479                         fan_control_desired_level = 7;
6480                 else
6481                         fan_control_desired_level = status;
6482         }
6483 }
6484
6485 static int fan_get_status(u8 *status)
6486 {
6487         u8 s;
6488
6489         /* TODO:
6490          * Add TPACPI_FAN_RD_ACPI_FANS ? */
6491
6492         switch (fan_status_access_mode) {
6493         case TPACPI_FAN_RD_ACPI_GFAN:
6494                 /* 570, 600e/x, 770e, 770x */
6495
6496                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6497                         return -EIO;
6498
6499                 if (likely(status))
6500                         *status = s & 0x07;
6501
6502                 break;
6503
6504         case TPACPI_FAN_RD_TPEC:
6505                 /* all except 570, 600e/x, 770e, 770x */
6506                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6507                         return -EIO;
6508
6509                 if (likely(status)) {
6510                         *status = s;
6511                         fan_quirk1_handle(status);
6512                 }
6513
6514                 break;
6515
6516         default:
6517                 return -ENXIO;
6518         }
6519
6520         return 0;
6521 }
6522
6523 static int fan_get_status_safe(u8 *status)
6524 {
6525         int rc;
6526         u8 s;
6527
6528         if (mutex_lock_killable(&fan_mutex))
6529                 return -ERESTARTSYS;
6530         rc = fan_get_status(&s);
6531         if (!rc)
6532                 fan_update_desired_level(s);
6533         mutex_unlock(&fan_mutex);
6534
6535         if (status)
6536                 *status = s;
6537
6538         return rc;
6539 }
6540
6541 static int fan_get_speed(unsigned int *speed)
6542 {
6543         u8 hi, lo;
6544
6545         switch (fan_status_access_mode) {
6546         case TPACPI_FAN_RD_TPEC:
6547                 /* all except 570, 600e/x, 770e, 770x */
6548                 if (unlikely(!fan_select_fan1()))
6549                         return -EIO;
6550                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6551                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6552                         return -EIO;
6553
6554                 if (likely(speed))
6555                         *speed = (hi << 8) | lo;
6556
6557                 break;
6558
6559         default:
6560                 return -ENXIO;
6561         }
6562
6563         return 0;
6564 }
6565
6566 static int fan2_get_speed(unsigned int *speed)
6567 {
6568         u8 hi, lo;
6569         bool rc;
6570
6571         switch (fan_status_access_mode) {
6572         case TPACPI_FAN_RD_TPEC:
6573                 /* all except 570, 600e/x, 770e, 770x */
6574                 if (unlikely(!fan_select_fan2()))
6575                         return -EIO;
6576                 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
6577                              !acpi_ec_read(fan_rpm_offset + 1, &hi);
6578                 fan_select_fan1(); /* play it safe */
6579                 if (rc)
6580                         return -EIO;
6581
6582                 if (likely(speed))
6583                         *speed = (hi << 8) | lo;
6584
6585                 break;
6586
6587         default:
6588                 return -ENXIO;
6589         }
6590
6591         return 0;
6592 }
6593
6594 static int fan_set_level(int level)
6595 {
6596         if (!fan_control_allowed)
6597                 return -EPERM;
6598
6599         switch (fan_control_access_mode) {
6600         case TPACPI_FAN_WR_ACPI_SFAN:
6601                 if (level >= 0 && level <= 7) {
6602                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6603                                 return -EIO;
6604                 } else
6605                         return -EINVAL;
6606                 break;
6607
6608         case TPACPI_FAN_WR_ACPI_FANS:
6609         case TPACPI_FAN_WR_TPEC:
6610                 if (!(level & TP_EC_FAN_AUTO) &&
6611                     !(level & TP_EC_FAN_FULLSPEED) &&
6612                     ((level < 0) || (level > 7)))
6613                         return -EINVAL;
6614
6615                 /* safety net should the EC not support AUTO
6616                  * or FULLSPEED mode bits and just ignore them */
6617                 if (level & TP_EC_FAN_FULLSPEED)
6618                         level |= 7;     /* safety min speed 7 */
6619                 else if (level & TP_EC_FAN_AUTO)
6620                         level |= 4;     /* safety min speed 4 */
6621
6622                 if (!acpi_ec_write(fan_status_offset, level))
6623                         return -EIO;
6624                 else
6625                         tp_features.fan_ctrl_status_undef = 0;
6626                 break;
6627
6628         default:
6629                 return -ENXIO;
6630         }
6631
6632         vdbg_printk(TPACPI_DBG_FAN,
6633                 "fan control: set fan control register to 0x%02x\n", level);
6634         return 0;
6635 }
6636
6637 static int fan_set_level_safe(int level)
6638 {
6639         int rc;
6640
6641         if (!fan_control_allowed)
6642                 return -EPERM;
6643
6644         if (mutex_lock_killable(&fan_mutex))
6645                 return -ERESTARTSYS;
6646
6647         if (level == TPACPI_FAN_LAST_LEVEL)
6648                 level = fan_control_desired_level;
6649
6650         rc = fan_set_level(level);
6651         if (!rc)
6652                 fan_update_desired_level(level);
6653
6654         mutex_unlock(&fan_mutex);
6655         return rc;
6656 }
6657
6658 static int fan_set_enable(void)
6659 {
6660         u8 s;
6661         int rc;
6662
6663         if (!fan_control_allowed)
6664                 return -EPERM;
6665
6666         if (mutex_lock_killable(&fan_mutex))
6667                 return -ERESTARTSYS;
6668
6669         switch (fan_control_access_mode) {
6670         case TPACPI_FAN_WR_ACPI_FANS:
6671         case TPACPI_FAN_WR_TPEC:
6672                 rc = fan_get_status(&s);
6673                 if (rc < 0)
6674                         break;
6675
6676                 /* Don't go out of emergency fan mode */
6677                 if (s != 7) {
6678                         s &= 0x07;
6679                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6680                 }
6681
6682                 if (!acpi_ec_write(fan_status_offset, s))
6683                         rc = -EIO;
6684                 else {
6685                         tp_features.fan_ctrl_status_undef = 0;
6686                         rc = 0;
6687                 }
6688                 break;
6689
6690         case TPACPI_FAN_WR_ACPI_SFAN:
6691                 rc = fan_get_status(&s);
6692                 if (rc < 0)
6693                         break;
6694
6695                 s &= 0x07;
6696
6697                 /* Set fan to at least level 4 */
6698                 s |= 4;
6699
6700                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6701                         rc = -EIO;
6702                 else
6703                         rc = 0;
6704                 break;
6705
6706         default:
6707                 rc = -ENXIO;
6708         }
6709
6710         mutex_unlock(&fan_mutex);
6711
6712         if (!rc)
6713                 vdbg_printk(TPACPI_DBG_FAN,
6714                         "fan control: set fan control register to 0x%02x\n",
6715                         s);
6716         return rc;
6717 }
6718
6719 static int fan_set_disable(void)
6720 {
6721         int rc;
6722
6723         if (!fan_control_allowed)
6724                 return -EPERM;
6725
6726         if (mutex_lock_killable(&fan_mutex))
6727                 return -ERESTARTSYS;
6728
6729         rc = 0;
6730         switch (fan_control_access_mode) {
6731         case TPACPI_FAN_WR_ACPI_FANS:
6732         case TPACPI_FAN_WR_TPEC:
6733                 if (!acpi_ec_write(fan_status_offset, 0x00))
6734                         rc = -EIO;
6735                 else {
6736                         fan_control_desired_level = 0;
6737                         tp_features.fan_ctrl_status_undef = 0;
6738                 }
6739                 break;
6740
6741         case TPACPI_FAN_WR_ACPI_SFAN:
6742                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6743                         rc = -EIO;
6744                 else
6745                         fan_control_desired_level = 0;
6746                 break;
6747
6748         default:
6749                 rc = -ENXIO;
6750         }
6751
6752         if (!rc)
6753                 vdbg_printk(TPACPI_DBG_FAN,
6754                         "fan control: set fan control register to 0\n");
6755
6756         mutex_unlock(&fan_mutex);
6757         return rc;
6758 }
6759
6760 static int fan_set_speed(int speed)
6761 {
6762         int rc;
6763
6764         if (!fan_control_allowed)
6765                 return -EPERM;
6766
6767         if (mutex_lock_killable(&fan_mutex))
6768                 return -ERESTARTSYS;
6769
6770         rc = 0;
6771         switch (fan_control_access_mode) {
6772         case TPACPI_FAN_WR_ACPI_FANS:
6773                 if (speed >= 0 && speed <= 65535) {
6774                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6775                                         speed, speed, speed))
6776                                 rc = -EIO;
6777                 } else
6778                         rc = -EINVAL;
6779                 break;
6780
6781         default:
6782                 rc = -ENXIO;
6783         }
6784
6785         mutex_unlock(&fan_mutex);
6786         return rc;
6787 }
6788
6789 static void fan_watchdog_reset(void)
6790 {
6791         static int fan_watchdog_active;
6792
6793         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6794                 return;
6795
6796         if (fan_watchdog_active)
6797                 cancel_delayed_work(&fan_watchdog_task);
6798
6799         if (fan_watchdog_maxinterval > 0 &&
6800             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6801                 fan_watchdog_active = 1;
6802                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6803                                 msecs_to_jiffies(fan_watchdog_maxinterval
6804                                                  * 1000))) {
6805                         printk(TPACPI_ERR
6806                                "failed to queue the fan watchdog, "
6807                                "watchdog will not trigger\n");
6808                 }
6809         } else
6810                 fan_watchdog_active = 0;
6811 }
6812
6813 static void fan_watchdog_fire(struct work_struct *ignored)
6814 {
6815         int rc;
6816
6817         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6818                 return;
6819
6820         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6821         rc = fan_set_enable();
6822         if (rc < 0) {
6823                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6824                         "will try again later...\n", -rc);
6825                 /* reschedule for later */
6826                 fan_watchdog_reset();
6827         }
6828 }
6829
6830 /*
6831  * SYSFS fan layout: hwmon compatible (device)
6832  *
6833  * pwm*_enable:
6834  *      0: "disengaged" mode
6835  *      1: manual mode
6836  *      2: native EC "auto" mode (recommended, hardware default)
6837  *
6838  * pwm*: set speed in manual mode, ignored otherwise.
6839  *      0 is level 0; 255 is level 7. Intermediate points done with linear
6840  *      interpolation.
6841  *
6842  * fan*_input: tachometer reading, RPM
6843  *
6844  *
6845  * SYSFS fan layout: extensions
6846  *
6847  * fan_watchdog (driver):
6848  *      fan watchdog interval in seconds, 0 disables (default), max 120
6849  */
6850
6851 /* sysfs fan pwm1_enable ----------------------------------------------- */
6852 static ssize_t fan_pwm1_enable_show(struct device *dev,
6853                                     struct device_attribute *attr,
6854                                     char *buf)
6855 {
6856         int res, mode;
6857         u8 status;
6858
6859         res = fan_get_status_safe(&status);
6860         if (res)
6861                 return res;
6862
6863         if (status & TP_EC_FAN_FULLSPEED) {
6864                 mode = 0;
6865         } else if (status & TP_EC_FAN_AUTO) {
6866                 mode = 2;
6867         } else
6868                 mode = 1;
6869
6870         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6871 }
6872
6873 static ssize_t fan_pwm1_enable_store(struct device *dev,
6874                                      struct device_attribute *attr,
6875                                      const char *buf, size_t count)
6876 {
6877         unsigned long t;
6878         int res, level;
6879
6880         if (parse_strtoul(buf, 2, &t))
6881                 return -EINVAL;
6882
6883         tpacpi_disclose_usertask("hwmon pwm1_enable",
6884                         "set fan mode to %lu\n", t);
6885
6886         switch (t) {
6887         case 0:
6888                 level = TP_EC_FAN_FULLSPEED;
6889                 break;
6890         case 1:
6891                 level = TPACPI_FAN_LAST_LEVEL;
6892                 break;
6893         case 2:
6894                 level = TP_EC_FAN_AUTO;
6895                 break;
6896         case 3:
6897                 /* reserved for software-controlled auto mode */
6898                 return -ENOSYS;
6899         default:
6900                 return -EINVAL;
6901         }
6902
6903         res = fan_set_level_safe(level);
6904         if (res == -ENXIO)
6905                 return -EINVAL;
6906         else if (res < 0)
6907                 return res;
6908
6909         fan_watchdog_reset();
6910
6911         return count;
6912 }
6913
6914 static struct device_attribute dev_attr_fan_pwm1_enable =
6915         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6916                 fan_pwm1_enable_show, fan_pwm1_enable_store);
6917
6918 /* sysfs fan pwm1 ------------------------------------------------------ */
6919 static ssize_t fan_pwm1_show(struct device *dev,
6920                              struct device_attribute *attr,
6921                              char *buf)
6922 {
6923         int res;
6924         u8 status;
6925
6926         res = fan_get_status_safe(&status);
6927         if (res)
6928                 return res;
6929
6930         if ((status &
6931              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6932                 status = fan_control_desired_level;
6933
6934         if (status > 7)
6935                 status = 7;
6936
6937         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6938 }
6939
6940 static ssize_t fan_pwm1_store(struct device *dev,
6941                               struct device_attribute *attr,
6942                               const char *buf, size_t count)
6943 {
6944         unsigned long s;
6945         int rc;
6946         u8 status, newlevel;
6947
6948         if (parse_strtoul(buf, 255, &s))
6949                 return -EINVAL;
6950
6951         tpacpi_disclose_usertask("hwmon pwm1",
6952                         "set fan speed to %lu\n", s);
6953
6954         /* scale down from 0-255 to 0-7 */
6955         newlevel = (s >> 5) & 0x07;
6956
6957         if (mutex_lock_killable(&fan_mutex))
6958                 return -ERESTARTSYS;
6959
6960         rc = fan_get_status(&status);
6961         if (!rc && (status &
6962                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6963                 rc = fan_set_level(newlevel);
6964                 if (rc == -ENXIO)
6965                         rc = -EINVAL;
6966                 else if (!rc) {
6967                         fan_update_desired_level(newlevel);
6968                         fan_watchdog_reset();
6969                 }
6970         }
6971
6972         mutex_unlock(&fan_mutex);
6973         return (rc)? rc : count;
6974 }
6975
6976 static struct device_attribute dev_attr_fan_pwm1 =
6977         __ATTR(pwm1, S_IWUSR | S_IRUGO,
6978                 fan_pwm1_show, fan_pwm1_store);
6979
6980 /* sysfs fan fan1_input ------------------------------------------------ */
6981 static ssize_t fan_fan1_input_show(struct device *dev,
6982                            struct device_attribute *attr,
6983                            char *buf)
6984 {
6985         int res;
6986         unsigned int speed;
6987
6988         res = fan_get_speed(&speed);
6989         if (res < 0)
6990                 return res;
6991
6992         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6993 }
6994
6995 static struct device_attribute dev_attr_fan_fan1_input =
6996         __ATTR(fan1_input, S_IRUGO,
6997                 fan_fan1_input_show, NULL);
6998
6999 /* sysfs fan fan2_input ------------------------------------------------ */
7000 static ssize_t fan_fan2_input_show(struct device *dev,
7001                            struct device_attribute *attr,
7002                            char *buf)
7003 {
7004         int res;
7005         unsigned int speed;
7006
7007         res = fan2_get_speed(&speed);
7008         if (res < 0)
7009                 return res;
7010
7011         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7012 }
7013
7014 static struct device_attribute dev_attr_fan_fan2_input =
7015         __ATTR(fan2_input, S_IRUGO,
7016                 fan_fan2_input_show, NULL);
7017
7018 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7019 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7020                                      char *buf)
7021 {
7022         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7023 }
7024
7025 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7026                                       const char *buf, size_t count)
7027 {
7028         unsigned long t;
7029
7030         if (parse_strtoul(buf, 120, &t))
7031                 return -EINVAL;
7032
7033         if (!fan_control_allowed)
7034                 return -EPERM;
7035
7036         fan_watchdog_maxinterval = t;
7037         fan_watchdog_reset();
7038
7039         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7040
7041         return count;
7042 }
7043
7044 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7045                 fan_fan_watchdog_show, fan_fan_watchdog_store);
7046
7047 /* --------------------------------------------------------------------- */
7048 static struct attribute *fan_attributes[] = {
7049         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7050         &dev_attr_fan_fan1_input.attr,
7051         NULL, /* for fan2_input */
7052         NULL
7053 };
7054
7055 static const struct attribute_group fan_attr_group = {
7056         .attrs = fan_attributes,
7057 };
7058
7059 #define TPACPI_FAN_Q1   0x0001          /* Unitialized HFSP */
7060 #define TPACPI_FAN_2FAN 0x0002          /* EC 0x31 bit 0 selects fan2 */
7061
7062 #define TPACPI_FAN_QI(__id1, __id2, __quirks)   \
7063         { .vendor = PCI_VENDOR_ID_IBM,          \
7064           .bios = TPACPI_MATCH_ANY,             \
7065           .ec = TPID(__id1, __id2),             \
7066           .quirks = __quirks }
7067
7068 #define TPACPI_FAN_QL(__id1, __id2, __quirks)   \
7069         { .vendor = PCI_VENDOR_ID_LENOVO,       \
7070           .bios = TPACPI_MATCH_ANY,             \
7071           .ec = TPID(__id1, __id2),             \
7072           .quirks = __quirks }
7073
7074 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7075         TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7076         TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7077         TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7078         TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7079         TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7080 };
7081
7082 #undef TPACPI_FAN_QL
7083 #undef TPACPI_FAN_QI
7084
7085 static int __init fan_init(struct ibm_init_struct *iibm)
7086 {
7087         int rc;
7088         unsigned long quirks;
7089
7090         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7091                         "initializing fan subdriver\n");
7092
7093         mutex_init(&fan_mutex);
7094         fan_status_access_mode = TPACPI_FAN_NONE;
7095         fan_control_access_mode = TPACPI_FAN_WR_NONE;
7096         fan_control_commands = 0;
7097         fan_watchdog_maxinterval = 0;
7098         tp_features.fan_ctrl_status_undef = 0;
7099         tp_features.second_fan = 0;
7100         fan_control_desired_level = 7;
7101
7102         TPACPI_ACPIHANDLE_INIT(fans);
7103         TPACPI_ACPIHANDLE_INIT(gfan);
7104         TPACPI_ACPIHANDLE_INIT(sfan);
7105
7106         quirks = tpacpi_check_quirks(fan_quirk_table,
7107                                      ARRAY_SIZE(fan_quirk_table));
7108
7109         if (gfan_handle) {
7110                 /* 570, 600e/x, 770e, 770x */
7111                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7112         } else {
7113                 /* all other ThinkPads: note that even old-style
7114                  * ThinkPad ECs supports the fan control register */
7115                 if (likely(acpi_ec_read(fan_status_offset,
7116                                         &fan_control_initial_status))) {
7117                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7118                         if (quirks & TPACPI_FAN_Q1)
7119                                 fan_quirk1_setup();
7120                         if (quirks & TPACPI_FAN_2FAN) {
7121                                 tp_features.second_fan = 1;
7122                                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7123                                         "secondary fan support enabled\n");
7124                         }
7125                 } else {
7126                         printk(TPACPI_ERR
7127                                "ThinkPad ACPI EC access misbehaving, "
7128                                "fan status and control unavailable\n");
7129                         return 1;
7130                 }
7131         }
7132
7133         if (sfan_handle) {
7134                 /* 570, 770x-JL */
7135                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7136                 fan_control_commands |=
7137                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7138         } else {
7139                 if (!gfan_handle) {
7140                         /* gfan without sfan means no fan control */
7141                         /* all other models implement TP EC 0x2f control */
7142
7143                         if (fans_handle) {
7144                                 /* X31, X40, X41 */
7145                                 fan_control_access_mode =
7146                                     TPACPI_FAN_WR_ACPI_FANS;
7147                                 fan_control_commands |=
7148                                     TPACPI_FAN_CMD_SPEED |
7149                                     TPACPI_FAN_CMD_LEVEL |
7150                                     TPACPI_FAN_CMD_ENABLE;
7151                         } else {
7152                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7153                                 fan_control_commands |=
7154                                     TPACPI_FAN_CMD_LEVEL |
7155                                     TPACPI_FAN_CMD_ENABLE;
7156                         }
7157                 }
7158         }
7159
7160         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7161                 "fan is %s, modes %d, %d\n",
7162                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7163                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
7164                 fan_status_access_mode, fan_control_access_mode);
7165
7166         /* fan control master switch */
7167         if (!fan_control_allowed) {
7168                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7169                 fan_control_commands = 0;
7170                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7171                            "fan control features disabled by parameter\n");
7172         }
7173
7174         /* update fan_control_desired_level */
7175         if (fan_status_access_mode != TPACPI_FAN_NONE)
7176                 fan_get_status_safe(NULL);
7177
7178         if (fan_status_access_mode != TPACPI_FAN_NONE ||
7179             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7180                 if (tp_features.second_fan) {
7181                         /* attach second fan tachometer */
7182                         fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7183                                         &dev_attr_fan_fan2_input.attr;
7184                 }
7185                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7186                                          &fan_attr_group);
7187                 if (rc < 0)
7188                         return rc;
7189
7190                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7191                                         &driver_attr_fan_watchdog);
7192                 if (rc < 0) {
7193                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7194                                         &fan_attr_group);
7195                         return rc;
7196                 }
7197                 return 0;
7198         } else
7199                 return 1;
7200 }
7201
7202 static void fan_exit(void)
7203 {
7204         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7205                     "cancelling any pending fan watchdog tasks\n");
7206
7207         /* FIXME: can we really do this unconditionally? */
7208         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7209         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7210                            &driver_attr_fan_watchdog);
7211
7212         cancel_delayed_work(&fan_watchdog_task);
7213         flush_workqueue(tpacpi_wq);
7214 }
7215
7216 static void fan_suspend(pm_message_t state)
7217 {
7218         int rc;
7219
7220         if (!fan_control_allowed)
7221                 return;
7222
7223         /* Store fan status in cache */
7224         fan_control_resume_level = 0;
7225         rc = fan_get_status_safe(&fan_control_resume_level);
7226         if (rc < 0)
7227                 printk(TPACPI_NOTICE
7228                         "failed to read fan level for later "
7229                         "restore during resume: %d\n", rc);
7230
7231         /* if it is undefined, don't attempt to restore it.
7232          * KEEP THIS LAST */
7233         if (tp_features.fan_ctrl_status_undef)
7234                 fan_control_resume_level = 0;
7235 }
7236
7237 static void fan_resume(void)
7238 {
7239         u8 current_level = 7;
7240         bool do_set = false;
7241         int rc;
7242
7243         /* DSDT *always* updates status on resume */
7244         tp_features.fan_ctrl_status_undef = 0;
7245
7246         if (!fan_control_allowed ||
7247             !fan_control_resume_level ||
7248             (fan_get_status_safe(&current_level) < 0))
7249                 return;
7250
7251         switch (fan_control_access_mode) {
7252         case TPACPI_FAN_WR_ACPI_SFAN:
7253                 /* never decrease fan level */
7254                 do_set = (fan_control_resume_level > current_level);
7255                 break;
7256         case TPACPI_FAN_WR_ACPI_FANS:
7257         case TPACPI_FAN_WR_TPEC:
7258                 /* never decrease fan level, scale is:
7259                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7260                  *
7261                  * We expect the firmware to set either 7 or AUTO, but we
7262                  * handle FULLSPEED out of paranoia.
7263                  *
7264                  * So, we can safely only restore FULLSPEED or 7, anything
7265                  * else could slow the fan.  Restoring AUTO is useless, at
7266                  * best that's exactly what the DSDT already set (it is the
7267                  * slower it uses).
7268                  *
7269                  * Always keep in mind that the DSDT *will* have set the
7270                  * fans to what the vendor supposes is the best level.  We
7271                  * muck with it only to speed the fan up.
7272                  */
7273                 if (fan_control_resume_level != 7 &&
7274                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7275                         return;
7276                 else
7277                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7278                                  (current_level != fan_control_resume_level);
7279                 break;
7280         default:
7281                 return;
7282         }
7283         if (do_set) {
7284                 printk(TPACPI_NOTICE
7285                         "restoring fan level to 0x%02x\n",
7286                         fan_control_resume_level);
7287                 rc = fan_set_level_safe(fan_control_resume_level);
7288                 if (rc < 0)
7289                         printk(TPACPI_NOTICE
7290                                 "failed to restore fan level: %d\n", rc);
7291         }
7292 }
7293
7294 static int fan_read(char *p)
7295 {
7296         int len = 0;
7297         int rc;
7298         u8 status;
7299         unsigned int speed = 0;
7300
7301         switch (fan_status_access_mode) {
7302         case TPACPI_FAN_RD_ACPI_GFAN:
7303                 /* 570, 600e/x, 770e, 770x */
7304                 rc = fan_get_status_safe(&status);
7305                 if (rc < 0)
7306                         return rc;
7307
7308                 len += sprintf(p + len, "status:\t\t%s\n"
7309                                "level:\t\t%d\n",
7310                                (status != 0) ? "enabled" : "disabled", status);
7311                 break;
7312
7313         case TPACPI_FAN_RD_TPEC:
7314                 /* all except 570, 600e/x, 770e, 770x */
7315                 rc = fan_get_status_safe(&status);
7316                 if (rc < 0)
7317                         return rc;
7318
7319                 len += sprintf(p + len, "status:\t\t%s\n",
7320                                (status != 0) ? "enabled" : "disabled");
7321
7322                 rc = fan_get_speed(&speed);
7323                 if (rc < 0)
7324                         return rc;
7325
7326                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7327
7328                 if (status & TP_EC_FAN_FULLSPEED)
7329                         /* Disengaged mode takes precedence */
7330                         len += sprintf(p + len, "level:\t\tdisengaged\n");
7331                 else if (status & TP_EC_FAN_AUTO)
7332                         len += sprintf(p + len, "level:\t\tauto\n");
7333                 else
7334                         len += sprintf(p + len, "level:\t\t%d\n", status);
7335                 break;
7336
7337         case TPACPI_FAN_NONE:
7338         default:
7339                 len += sprintf(p + len, "status:\t\tnot supported\n");
7340         }
7341
7342         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7343                 len += sprintf(p + len, "commands:\tlevel <level>");
7344
7345                 switch (fan_control_access_mode) {
7346                 case TPACPI_FAN_WR_ACPI_SFAN:
7347                         len += sprintf(p + len, " (<level> is 0-7)\n");
7348                         break;
7349
7350                 default:
7351                         len += sprintf(p + len, " (<level> is 0-7, "
7352                                        "auto, disengaged, full-speed)\n");
7353                         break;
7354                 }
7355         }
7356
7357         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7358                 len += sprintf(p + len, "commands:\tenable, disable\n"
7359                                "commands:\twatchdog <timeout> (<timeout> "
7360                                "is 0 (off), 1-120 (seconds))\n");
7361
7362         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7363                 len += sprintf(p + len, "commands:\tspeed <speed>"
7364                                " (<speed> is 0-65535)\n");
7365
7366         return len;
7367 }
7368
7369 static int fan_write_cmd_level(const char *cmd, int *rc)
7370 {
7371         int level;
7372
7373         if (strlencmp(cmd, "level auto") == 0)
7374                 level = TP_EC_FAN_AUTO;
7375         else if ((strlencmp(cmd, "level disengaged") == 0) |
7376                         (strlencmp(cmd, "level full-speed") == 0))
7377                 level = TP_EC_FAN_FULLSPEED;
7378         else if (sscanf(cmd, "level %d", &level) != 1)
7379                 return 0;
7380
7381         *rc = fan_set_level_safe(level);
7382         if (*rc == -ENXIO)
7383                 printk(TPACPI_ERR "level command accepted for unsupported "
7384                        "access mode %d", fan_control_access_mode);
7385         else if (!*rc)
7386                 tpacpi_disclose_usertask("procfs fan",
7387                         "set level to %d\n", level);
7388
7389         return 1;
7390 }
7391
7392 static int fan_write_cmd_enable(const char *cmd, int *rc)
7393 {
7394         if (strlencmp(cmd, "enable") != 0)
7395                 return 0;
7396
7397         *rc = fan_set_enable();
7398         if (*rc == -ENXIO)
7399                 printk(TPACPI_ERR "enable command accepted for unsupported "
7400                        "access mode %d", fan_control_access_mode);
7401         else if (!*rc)
7402                 tpacpi_disclose_usertask("procfs fan", "enable\n");
7403
7404         return 1;
7405 }
7406
7407 static int fan_write_cmd_disable(const char *cmd, int *rc)
7408 {
7409         if (strlencmp(cmd, "disable") != 0)
7410                 return 0;
7411
7412         *rc = fan_set_disable();
7413         if (*rc == -ENXIO)
7414                 printk(TPACPI_ERR "disable command accepted for unsupported "
7415                        "access mode %d", fan_control_access_mode);
7416         else if (!*rc)
7417                 tpacpi_disclose_usertask("procfs fan", "disable\n");
7418
7419         return 1;
7420 }
7421
7422 static int fan_write_cmd_speed(const char *cmd, int *rc)
7423 {
7424         int speed;
7425
7426         /* TODO:
7427          * Support speed <low> <medium> <high> ? */
7428
7429         if (sscanf(cmd, "speed %d", &speed) != 1)
7430                 return 0;
7431
7432         *rc = fan_set_speed(speed);
7433         if (*rc == -ENXIO)
7434                 printk(TPACPI_ERR "speed command accepted for unsupported "
7435                        "access mode %d", fan_control_access_mode);
7436         else if (!*rc)
7437                 tpacpi_disclose_usertask("procfs fan",
7438                         "set speed to %d\n", speed);
7439
7440         return 1;
7441 }
7442
7443 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7444 {
7445         int interval;
7446
7447         if (sscanf(cmd, "watchdog %d", &interval) != 1)
7448                 return 0;
7449
7450         if (interval < 0 || interval > 120)
7451                 *rc = -EINVAL;
7452         else {
7453                 fan_watchdog_maxinterval = interval;
7454                 tpacpi_disclose_usertask("procfs fan",
7455                         "set watchdog timer to %d\n",
7456                         interval);
7457         }
7458
7459         return 1;
7460 }
7461
7462 static int fan_write(char *buf)
7463 {
7464         char *cmd;
7465         int rc = 0;
7466
7467         while (!rc && (cmd = next_cmd(&buf))) {
7468                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7469                       fan_write_cmd_level(cmd, &rc)) &&
7470                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7471                       (fan_write_cmd_enable(cmd, &rc) ||
7472                        fan_write_cmd_disable(cmd, &rc) ||
7473                        fan_write_cmd_watchdog(cmd, &rc))) &&
7474                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7475                       fan_write_cmd_speed(cmd, &rc))
7476                     )
7477                         rc = -EINVAL;
7478                 else if (!rc)
7479                         fan_watchdog_reset();
7480         }
7481
7482         return rc;
7483 }
7484
7485 static struct ibm_struct fan_driver_data = {
7486         .name = "fan",
7487         .read = fan_read,
7488         .write = fan_write,
7489         .exit = fan_exit,
7490         .suspend = fan_suspend,
7491         .resume = fan_resume,
7492 };
7493
7494 /****************************************************************************
7495  ****************************************************************************
7496  *
7497  * Infrastructure
7498  *
7499  ****************************************************************************
7500  ****************************************************************************/
7501
7502 /* sysfs name ---------------------------------------------------------- */
7503 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7504                            struct device_attribute *attr,
7505                            char *buf)
7506 {
7507         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7508 }
7509
7510 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7511         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7512
7513 /* --------------------------------------------------------------------- */
7514
7515 /* /proc support */
7516 static struct proc_dir_entry *proc_dir;
7517
7518 /*
7519  * Module and infrastructure proble, init and exit handling
7520  */
7521
7522 static int force_load;
7523
7524 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7525 static const char * __init str_supported(int is_supported)
7526 {
7527         static char text_unsupported[] __initdata = "not supported";
7528
7529         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7530 }
7531 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7532
7533 static void ibm_exit(struct ibm_struct *ibm)
7534 {
7535         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7536
7537         list_del_init(&ibm->all_drivers);
7538
7539         if (ibm->flags.acpi_notify_installed) {
7540                 dbg_printk(TPACPI_DBG_EXIT,
7541                         "%s: acpi_remove_notify_handler\n", ibm->name);
7542                 BUG_ON(!ibm->acpi);
7543                 acpi_remove_notify_handler(*ibm->acpi->handle,
7544                                            ibm->acpi->type,
7545                                            dispatch_acpi_notify);
7546                 ibm->flags.acpi_notify_installed = 0;
7547                 ibm->flags.acpi_notify_installed = 0;
7548         }
7549
7550         if (ibm->flags.proc_created) {
7551                 dbg_printk(TPACPI_DBG_EXIT,
7552                         "%s: remove_proc_entry\n", ibm->name);
7553                 remove_proc_entry(ibm->name, proc_dir);
7554                 ibm->flags.proc_created = 0;
7555         }
7556
7557         if (ibm->flags.acpi_driver_registered) {
7558                 dbg_printk(TPACPI_DBG_EXIT,
7559                         "%s: acpi_bus_unregister_driver\n", ibm->name);
7560                 BUG_ON(!ibm->acpi);
7561                 acpi_bus_unregister_driver(ibm->acpi->driver);
7562                 kfree(ibm->acpi->driver);
7563                 ibm->acpi->driver = NULL;
7564                 ibm->flags.acpi_driver_registered = 0;
7565         }
7566
7567         if (ibm->flags.init_called && ibm->exit) {
7568                 ibm->exit();
7569                 ibm->flags.init_called = 0;
7570         }
7571
7572         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7573 }
7574
7575 static int __init ibm_init(struct ibm_init_struct *iibm)
7576 {
7577         int ret;
7578         struct ibm_struct *ibm = iibm->data;
7579         struct proc_dir_entry *entry;
7580
7581         BUG_ON(ibm == NULL);
7582
7583         INIT_LIST_HEAD(&ibm->all_drivers);
7584
7585         if (ibm->flags.experimental && !experimental)
7586                 return 0;
7587
7588         dbg_printk(TPACPI_DBG_INIT,
7589                 "probing for %s\n", ibm->name);
7590
7591         if (iibm->init) {
7592                 ret = iibm->init(iibm);
7593                 if (ret > 0)
7594                         return 0;       /* probe failed */
7595                 if (ret)
7596                         return ret;
7597
7598                 ibm->flags.init_called = 1;
7599         }
7600
7601         if (ibm->acpi) {
7602                 if (ibm->acpi->hid) {
7603                         ret = register_tpacpi_subdriver(ibm);
7604                         if (ret)
7605                                 goto err_out;
7606                 }
7607
7608                 if (ibm->acpi->notify) {
7609                         ret = setup_acpi_notify(ibm);
7610                         if (ret == -ENODEV) {
7611                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7612                                         ibm->name);
7613                                 ret = 0;
7614                                 goto err_out;
7615                         }
7616                         if (ret < 0)
7617                                 goto err_out;
7618                 }
7619         }
7620
7621         dbg_printk(TPACPI_DBG_INIT,
7622                 "%s installed\n", ibm->name);
7623
7624         if (ibm->read) {
7625                 entry = create_proc_entry(ibm->name,
7626                                           S_IFREG | S_IRUGO | S_IWUSR,
7627                                           proc_dir);
7628                 if (!entry) {
7629                         printk(TPACPI_ERR "unable to create proc entry %s\n",
7630                                ibm->name);
7631                         ret = -ENODEV;
7632                         goto err_out;
7633                 }
7634                 entry->data = ibm;
7635                 entry->read_proc = &dispatch_procfs_read;
7636                 if (ibm->write)
7637                         entry->write_proc = &dispatch_procfs_write;
7638                 ibm->flags.proc_created = 1;
7639         }
7640
7641         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7642
7643         return 0;
7644
7645 err_out:
7646         dbg_printk(TPACPI_DBG_INIT,
7647                 "%s: at error exit path with result %d\n",
7648                 ibm->name, ret);
7649
7650         ibm_exit(ibm);
7651         return (ret < 0)? ret : 0;
7652 }
7653
7654 /* Probing */
7655
7656 static bool __pure __init tpacpi_is_fw_digit(const char c)
7657 {
7658         return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
7659 }
7660
7661 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
7662 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
7663                                                 const char t)
7664 {
7665         return s && strlen(s) >= 8 &&
7666                 tpacpi_is_fw_digit(s[0]) &&
7667                 tpacpi_is_fw_digit(s[1]) &&
7668                 s[2] == t && s[3] == 'T' &&
7669                 tpacpi_is_fw_digit(s[4]) &&
7670                 tpacpi_is_fw_digit(s[5]) &&
7671                 s[6] == 'W' && s[7] == 'W';
7672 }
7673
7674 /* returns 0 - probe ok, or < 0 - probe error.
7675  * Probe ok doesn't mean thinkpad found.
7676  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7677 static int __must_check __init get_thinkpad_model_data(
7678                                                 struct thinkpad_id_data *tp)
7679 {
7680         const struct dmi_device *dev = NULL;
7681         char ec_fw_string[18];
7682         char const *s;
7683
7684         if (!tp)
7685                 return -EINVAL;
7686
7687         memset(tp, 0, sizeof(*tp));
7688
7689         if (dmi_name_in_vendors("IBM"))
7690                 tp->vendor = PCI_VENDOR_ID_IBM;
7691         else if (dmi_name_in_vendors("LENOVO"))
7692                 tp->vendor = PCI_VENDOR_ID_LENOVO;
7693         else
7694                 return 0;
7695
7696         s = dmi_get_system_info(DMI_BIOS_VERSION);
7697         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7698         if (s && !tp->bios_version_str)
7699                 return -ENOMEM;
7700
7701         /* Really ancient ThinkPad 240X will fail this, which is fine */
7702         if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
7703                 return 0;
7704
7705         tp->bios_model = tp->bios_version_str[0]
7706                          | (tp->bios_version_str[1] << 8);
7707         tp->bios_release = (tp->bios_version_str[4] << 8)
7708                          | tp->bios_version_str[5];
7709
7710         /*
7711          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7712          * X32 or newer, all Z series;  Some models must have an
7713          * up-to-date BIOS or they will not be detected.
7714          *
7715          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7716          */
7717         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7718                 if (sscanf(dev->name,
7719                            "IBM ThinkPad Embedded Controller -[%17c",
7720                            ec_fw_string) == 1) {
7721                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7722                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7723
7724                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7725                         if (!tp->ec_version_str)
7726                                 return -ENOMEM;
7727
7728                         if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
7729                                 tp->ec_model = ec_fw_string[0]
7730                                                 | (ec_fw_string[1] << 8);
7731                                 tp->ec_release = (ec_fw_string[4] << 8)
7732                                                 | ec_fw_string[5];
7733                         } else {
7734                                 printk(TPACPI_NOTICE
7735                                         "ThinkPad firmware release %s "
7736                                         "doesn't match the known patterns\n",
7737                                         ec_fw_string);
7738                                 printk(TPACPI_NOTICE
7739                                         "please report this to %s\n",
7740                                         TPACPI_MAIL);
7741                         }
7742                         break;
7743                 }
7744         }
7745
7746         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7747         if (s && !strnicmp(s, "ThinkPad", 8)) {
7748                 tp->model_str = kstrdup(s, GFP_KERNEL);
7749                 if (!tp->model_str)
7750                         return -ENOMEM;
7751         }
7752
7753         s = dmi_get_system_info(DMI_PRODUCT_NAME);
7754         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7755         if (s && !tp->nummodel_str)
7756                 return -ENOMEM;
7757
7758         return 0;
7759 }
7760
7761 static int __init probe_for_thinkpad(void)
7762 {
7763         int is_thinkpad;
7764
7765         if (acpi_disabled)
7766                 return -ENODEV;
7767
7768         /*
7769          * Non-ancient models have better DMI tagging, but very old models
7770          * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
7771          */
7772         is_thinkpad = (thinkpad_id.model_str != NULL) ||
7773                       (thinkpad_id.ec_model != 0) ||
7774                       tpacpi_is_fw_known();
7775
7776         /* ec is required because many other handles are relative to it */
7777         TPACPI_ACPIHANDLE_INIT(ec);
7778         if (!ec_handle) {
7779                 if (is_thinkpad)
7780                         printk(TPACPI_ERR
7781                                 "Not yet supported ThinkPad detected!\n");
7782                 return -ENODEV;
7783         }
7784
7785         if (!is_thinkpad && !force_load)
7786                 return -ENODEV;
7787
7788         return 0;
7789 }
7790
7791
7792 /* Module init, exit, parameters */
7793
7794 static struct ibm_init_struct ibms_init[] __initdata = {
7795         {
7796                 .init = thinkpad_acpi_driver_init,
7797                 .data = &thinkpad_acpi_driver_data,
7798         },
7799         {
7800                 .init = hotkey_init,
7801                 .data = &hotkey_driver_data,
7802         },
7803         {
7804                 .init = bluetooth_init,
7805                 .data = &bluetooth_driver_data,
7806         },
7807         {
7808                 .init = wan_init,
7809                 .data = &wan_driver_data,
7810         },
7811         {
7812                 .init = uwb_init,
7813                 .data = &uwb_driver_data,
7814         },
7815 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7816         {
7817                 .init = video_init,
7818                 .data = &video_driver_data,
7819         },
7820 #endif
7821         {
7822                 .init = light_init,
7823                 .data = &light_driver_data,
7824         },
7825         {
7826                 .init = cmos_init,
7827                 .data = &cmos_driver_data,
7828         },
7829         {
7830                 .init = led_init,
7831                 .data = &led_driver_data,
7832         },
7833         {
7834                 .init = beep_init,
7835                 .data = &beep_driver_data,
7836         },
7837         {
7838                 .init = thermal_init,
7839                 .data = &thermal_driver_data,
7840         },
7841         {
7842                 .data = &ecdump_driver_data,
7843         },
7844         {
7845                 .init = brightness_init,
7846                 .data = &brightness_driver_data,
7847         },
7848         {
7849                 .data = &volume_driver_data,
7850         },
7851         {
7852                 .init = fan_init,
7853                 .data = &fan_driver_data,
7854         },
7855 };
7856
7857 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7858 {
7859         unsigned int i;
7860         struct ibm_struct *ibm;
7861
7862         if (!kp || !kp->name || !val)
7863                 return -EINVAL;
7864
7865         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7866                 ibm = ibms_init[i].data;
7867                 WARN_ON(ibm == NULL);
7868
7869                 if (!ibm || !ibm->name)
7870                         continue;
7871
7872                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7873                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7874                                 return -ENOSPC;
7875                         strcpy(ibms_init[i].param, val);
7876                         strcat(ibms_init[i].param, ",");
7877                         return 0;
7878                 }
7879         }
7880
7881         return -EINVAL;
7882 }
7883
7884 module_param(experimental, int, 0);
7885 MODULE_PARM_DESC(experimental,
7886                  "Enables experimental features when non-zero");
7887
7888 module_param_named(debug, dbg_level, uint, 0);
7889 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7890
7891 module_param(force_load, bool, 0);
7892 MODULE_PARM_DESC(force_load,
7893                  "Attempts to load the driver even on a "
7894                  "mis-identified ThinkPad when true");
7895
7896 module_param_named(fan_control, fan_control_allowed, bool, 0);
7897 MODULE_PARM_DESC(fan_control,
7898                  "Enables setting fan parameters features when true");
7899
7900 module_param_named(brightness_mode, brightness_mode, uint, 0);
7901 MODULE_PARM_DESC(brightness_mode,
7902                  "Selects brightness control strategy: "
7903                  "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
7904
7905 module_param(brightness_enable, uint, 0);
7906 MODULE_PARM_DESC(brightness_enable,
7907                  "Enables backlight control when 1, disables when 0");
7908
7909 module_param(hotkey_report_mode, uint, 0);
7910 MODULE_PARM_DESC(hotkey_report_mode,
7911                  "used for backwards compatibility with userspace, "
7912                  "see documentation");
7913
7914 #define TPACPI_PARAM(feature) \
7915         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7916         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7917                          "at module load, see documentation")
7918
7919 TPACPI_PARAM(hotkey);
7920 TPACPI_PARAM(bluetooth);
7921 TPACPI_PARAM(video);
7922 TPACPI_PARAM(light);
7923 TPACPI_PARAM(cmos);
7924 TPACPI_PARAM(led);
7925 TPACPI_PARAM(beep);
7926 TPACPI_PARAM(ecdump);
7927 TPACPI_PARAM(brightness);
7928 TPACPI_PARAM(volume);
7929 TPACPI_PARAM(fan);
7930
7931 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7932 module_param(dbg_wlswemul, uint, 0);
7933 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7934 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7935 MODULE_PARM_DESC(wlsw_state,
7936                  "Initial state of the emulated WLSW switch");
7937
7938 module_param(dbg_bluetoothemul, uint, 0);
7939 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7940 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7941 MODULE_PARM_DESC(bluetooth_state,
7942                  "Initial state of the emulated bluetooth switch");
7943
7944 module_param(dbg_wwanemul, uint, 0);
7945 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7946 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7947 MODULE_PARM_DESC(wwan_state,
7948                  "Initial state of the emulated WWAN switch");
7949
7950 module_param(dbg_uwbemul, uint, 0);
7951 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7952 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7953 MODULE_PARM_DESC(uwb_state,
7954                  "Initial state of the emulated UWB switch");
7955 #endif
7956
7957 static void thinkpad_acpi_module_exit(void)
7958 {
7959         struct ibm_struct *ibm, *itmp;
7960
7961         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7962
7963         list_for_each_entry_safe_reverse(ibm, itmp,
7964                                          &tpacpi_all_drivers,
7965                                          all_drivers) {
7966                 ibm_exit(ibm);
7967         }
7968
7969         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7970
7971         if (tpacpi_inputdev) {
7972                 if (tp_features.input_device_registered)
7973                         input_unregister_device(tpacpi_inputdev);
7974                 else
7975                         input_free_device(tpacpi_inputdev);
7976         }
7977
7978         if (tpacpi_hwmon)
7979                 hwmon_device_unregister(tpacpi_hwmon);
7980
7981         if (tp_features.sensors_pdev_attrs_registered)
7982                 device_remove_file(&tpacpi_sensors_pdev->dev,
7983                                    &dev_attr_thinkpad_acpi_pdev_name);
7984         if (tpacpi_sensors_pdev)
7985                 platform_device_unregister(tpacpi_sensors_pdev);
7986         if (tpacpi_pdev)
7987                 platform_device_unregister(tpacpi_pdev);
7988
7989         if (tp_features.sensors_pdrv_attrs_registered)
7990                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7991         if (tp_features.platform_drv_attrs_registered)
7992                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7993
7994         if (tp_features.sensors_pdrv_registered)
7995                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7996
7997         if (tp_features.platform_drv_registered)
7998                 platform_driver_unregister(&tpacpi_pdriver);
7999
8000         if (proc_dir)
8001                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8002
8003         if (tpacpi_wq)
8004                 destroy_workqueue(tpacpi_wq);
8005
8006         kfree(thinkpad_id.bios_version_str);
8007         kfree(thinkpad_id.ec_version_str);
8008         kfree(thinkpad_id.model_str);
8009 }
8010
8011
8012 static int __init thinkpad_acpi_module_init(void)
8013 {
8014         int ret, i;
8015
8016         tpacpi_lifecycle = TPACPI_LIFE_INIT;
8017
8018         /* Parameter checking */
8019         if (hotkey_report_mode > 2)
8020                 return -EINVAL;
8021
8022         /* Driver-level probe */
8023
8024         ret = get_thinkpad_model_data(&thinkpad_id);
8025         if (ret) {
8026                 printk(TPACPI_ERR
8027                         "unable to get DMI data: %d\n", ret);
8028                 thinkpad_acpi_module_exit();
8029                 return ret;
8030         }
8031         ret = probe_for_thinkpad();
8032         if (ret) {
8033                 thinkpad_acpi_module_exit();
8034                 return ret;
8035         }
8036
8037         /* Driver initialization */
8038
8039         TPACPI_ACPIHANDLE_INIT(ecrd);
8040         TPACPI_ACPIHANDLE_INIT(ecwr);
8041
8042         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8043         if (!tpacpi_wq) {
8044                 thinkpad_acpi_module_exit();
8045                 return -ENOMEM;
8046         }
8047
8048         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8049         if (!proc_dir) {
8050                 printk(TPACPI_ERR
8051                        "unable to create proc dir " TPACPI_PROC_DIR);
8052                 thinkpad_acpi_module_exit();
8053                 return -ENODEV;
8054         }
8055
8056         ret = platform_driver_register(&tpacpi_pdriver);
8057         if (ret) {
8058                 printk(TPACPI_ERR
8059                        "unable to register main platform driver\n");
8060                 thinkpad_acpi_module_exit();
8061                 return ret;
8062         }
8063         tp_features.platform_drv_registered = 1;
8064
8065         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8066         if (ret) {
8067                 printk(TPACPI_ERR
8068                        "unable to register hwmon platform driver\n");
8069                 thinkpad_acpi_module_exit();
8070                 return ret;
8071         }
8072         tp_features.sensors_pdrv_registered = 1;
8073
8074         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8075         if (!ret) {
8076                 tp_features.platform_drv_attrs_registered = 1;
8077                 ret = tpacpi_create_driver_attributes(
8078                                         &tpacpi_hwmon_pdriver.driver);
8079         }
8080         if (ret) {
8081                 printk(TPACPI_ERR
8082                        "unable to create sysfs driver attributes\n");
8083                 thinkpad_acpi_module_exit();
8084                 return ret;
8085         }
8086         tp_features.sensors_pdrv_attrs_registered = 1;
8087
8088
8089         /* Device initialization */
8090         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8091                                                         NULL, 0);
8092         if (IS_ERR(tpacpi_pdev)) {
8093                 ret = PTR_ERR(tpacpi_pdev);
8094                 tpacpi_pdev = NULL;
8095                 printk(TPACPI_ERR "unable to register platform device\n");
8096                 thinkpad_acpi_module_exit();
8097                 return ret;
8098         }
8099         tpacpi_sensors_pdev = platform_device_register_simple(
8100                                                 TPACPI_HWMON_DRVR_NAME,
8101                                                 -1, NULL, 0);
8102         if (IS_ERR(tpacpi_sensors_pdev)) {
8103                 ret = PTR_ERR(tpacpi_sensors_pdev);
8104                 tpacpi_sensors_pdev = NULL;
8105                 printk(TPACPI_ERR
8106                        "unable to register hwmon platform device\n");
8107                 thinkpad_acpi_module_exit();
8108                 return ret;
8109         }
8110         ret = device_create_file(&tpacpi_sensors_pdev->dev,
8111                                  &dev_attr_thinkpad_acpi_pdev_name);
8112         if (ret) {
8113                 printk(TPACPI_ERR
8114                        "unable to create sysfs hwmon device attributes\n");
8115                 thinkpad_acpi_module_exit();
8116                 return ret;
8117         }
8118         tp_features.sensors_pdev_attrs_registered = 1;
8119         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8120         if (IS_ERR(tpacpi_hwmon)) {
8121                 ret = PTR_ERR(tpacpi_hwmon);
8122                 tpacpi_hwmon = NULL;
8123                 printk(TPACPI_ERR "unable to register hwmon device\n");
8124                 thinkpad_acpi_module_exit();
8125                 return ret;
8126         }
8127         mutex_init(&tpacpi_inputdev_send_mutex);
8128         tpacpi_inputdev = input_allocate_device();
8129         if (!tpacpi_inputdev) {
8130                 printk(TPACPI_ERR "unable to allocate input device\n");
8131                 thinkpad_acpi_module_exit();
8132                 return -ENOMEM;
8133         } else {
8134                 /* Prepare input device, but don't register */
8135                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8136                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8137                 tpacpi_inputdev->id.bustype = BUS_HOST;
8138                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8139                                                 thinkpad_id.vendor :
8140                                                 PCI_VENDOR_ID_IBM;
8141                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8142                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8143         }
8144         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8145                 ret = ibm_init(&ibms_init[i]);
8146                 if (ret >= 0 && *ibms_init[i].param)
8147                         ret = ibms_init[i].data->write(ibms_init[i].param);
8148                 if (ret < 0) {
8149                         thinkpad_acpi_module_exit();
8150                         return ret;
8151                 }
8152         }
8153         ret = input_register_device(tpacpi_inputdev);
8154         if (ret < 0) {
8155                 printk(TPACPI_ERR "unable to register input device\n");
8156                 thinkpad_acpi_module_exit();
8157                 return ret;
8158         } else {
8159                 tp_features.input_device_registered = 1;
8160         }
8161
8162         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
8163         return 0;
8164 }
8165
8166 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
8167
8168 /*
8169  * This will autoload the driver in almost every ThinkPad
8170  * in widespread use.
8171  *
8172  * Only _VERY_ old models, like the 240, 240x and 570 lack
8173  * the HKEY event interface.
8174  */
8175 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8176
8177 /*
8178  * DMI matching for module autoloading
8179  *
8180  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8181  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8182  *
8183  * Only models listed in thinkwiki will be supported, so add yours
8184  * if it is not there yet.
8185  */
8186 #define IBM_BIOS_MODULE_ALIAS(__type) \
8187         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8188
8189 /* Ancient thinkpad BIOSes have to be identified by
8190  * BIOS type or model number, and there are far less
8191  * BIOS types than model numbers... */
8192 IBM_BIOS_MODULE_ALIAS("I[MU]");         /* 570, 570e */
8193
8194 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8195 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8196 MODULE_DESCRIPTION(TPACPI_DESC);
8197 MODULE_VERSION(TPACPI_VERSION);
8198 MODULE_LICENSE("GPL");
8199
8200 module_init(thinkpad_acpi_module_init);
8201 module_exit(thinkpad_acpi_module_exit);